Other general publicity slogans and venue slogans are white.
Where does the proximity switch apply? Proximity switches are inductive and capacitive, and the sensing medium is usually metal. It can be applied to industrial control, generally speaking, it can be applied to the position signal feedback of industrial control mechanism and actuator, such as the origin of stepping motor, cylinder position and so on.
What are the common methods of foundation reinforcement and what occasions are they suitable for? According to the national standard "Technical Specification for Building Foundation Treatment" JGJ 79-20 1 2 (implemented on June, 20654381day)
Foundation treatment methods mainly include:
1, cushion replacement method
2, preloading foundation
3. Tamp the foundation
Step 4 lay a solid foundation
5, vibro-replacement gravel pile composite foundation
6. Immersed sand-gravel pile composite foundation
7. Cement-soil mixing pile composite foundation
8, jet grouting pile composite foundation
9, lime soil compaction pile and plain soil compaction pile composite foundation
10, tamp cement-soil pile composite foundation.
1 1, CFG composite foundation
12, column hammer tamping pile composite foundation
13, grouting to strengthen foundation
14, micro-piles, root piles, precast piles, grouting steel pipe piles, etc.
Where is the special letter of credit applicable? What does the so-called special letter of credit mean? Documentary letters of credit are generally common and can be divided into: sight letters of credit and forward letters of credit according to payment methods; Sight letter of credit can be divided into sight payment letter of credit and sight negotiation letter of credit; Usance letters of credit can be divided into: usance acceptance letters of credit and deferred payment letters of credit.
If we want to talk about some special letters of credit, there is a prepayment letter of credit (also called red clause letter of credit)-this letter of credit is used when the beneficiary needs a certain proportion of prepayment, and the applicant and the issuing bank accept this requirement and allow the beneficiary to pay part of the price in advance under the letter of credit.
Another special letter of credit is standby letter of credit, which is a letter of credit that provides guarantee, that is, standby letter of credit means that the issuing bank provides guarantee for the applicant, and the applicant will fulfill an agreed obligation to the beneficiary. If the applicant fails to fulfill the agreed obligations, the issuing bank will guarantee to pay the amount under the standby letter of credit to the beneficiary as compensation.
When is it suitable to entrust the collection method?
Entrusted collection is a settlement method in which the payee entrusts the bank to collect money from the payer. Units and individuals can collect money in the same city and in different places. There are two ways to remit the settlement of entrusted collection: mail and telegram.
Collection and acceptance
Collection and acceptance refers to the settlement method that the payee entrusts the bank to collect the payment from the payer in different places according to the purchase and sale contract, and the payer confirms the payment to the bank. Collection and acceptance must be state-owned enterprises, supply and marketing cooperatives and urban and rural collective-owned industrial enterprises that are well managed and approved by banks. Remittances accepted by collection can be divided into two ways: mail and telegram. The starting point of each settlement is 10000 yuan, and the Xinhua Bookstore system is 1000 yuan. When the collection and acceptance settlement method is adopted, the buyer and the seller must sign a purchase and sale contract that conforms to the economic contract law, and stipulate the collection and acceptance settlement method in the contract. According to the provisions of the "Payment and Settlement Measures", the promised payment is divided into two types: payment by ticket and payment by ticket. Inspection and payment refers to the receipt and settlement vouchers, invoices and bills, prepaid transportation and miscellaneous fees handed over by the purchasing enterprise to the bank according to the economic contract, and the payment can only be confirmed after being verified by the exchange. Inspection and payment means that before the goods arrive at the enterprise, the purchasing enterprise will not recognize the payment and will check whether it fully conforms to the contract. Letter of credit letter of credit settlement is a major way of international settlement. If the letter of credit is used for settlement, the payee will prepare the goods for shipment after receiving the letter of credit, issue relevant invoices and bills, send them to the bank together with the transportation documents and the letter of credit, and prepare the receipt voucher according to the returned letter of credit and other relevant documents; After receiving the notice from the issuing bank, the payer shall prepare the payment voucher according to the relevant payment voucher.
Where is the capacitive filter suitable? Purpose: power supply filtering (removing non-DC components through capacitor charging and discharging), improving power factor (adding when inductive load is too large); Application: It is a common component, and there is no special restriction on the application occasions.
The low-frequency filter capacitor is mainly used for mains power filtering or transformer rectification filtering, and its working frequency is 50Hz, which is consistent with the power supply. High-frequency filter capacitor mainly works in the filtering after rectification of switching power supply, and its working frequency is from several thousand Hz to tens of thousands Hz. Filter capacitor plays a very important role in switching power supply. How to choose the filter capacitor correctly, especially the output filter capacitor, is a problem that every engineer and technician is very concerned about.
Capacitance filter is a kind of energy storage device installed at both ends of rectifier circuit, which is used to reduce AC ripple coefficient and improve efficient and smooth DC output. This device is usually called a filter capacitor. Filter capacitor has polarity, also known as electrolytic capacitor. One end of the electrolytic capacitor is a positive electrode, and the other end is a negative electrode. The positive electrode is connected with the positive electrode of the rectification output circuit, and the negative electrode is connected with the negative electrode of the circuit. In all circuits that need to convert alternating current into direct current, setting filter capacitors will make the working performance of electronic circuits more stable and reduce the interference of alternating current ripple on electronic circuits. The symbol of the filter capacitor in the circuit is generally represented by "C", and the capacitance is determined according to the load resistance and output current. When the filter capacitor reaches a certain capacity, increasing the capacitor capacity will have adverse effects on other indicators.
Hollow wall is generally suitable for any occasion with light weight and low cost, and can be used as a load-bearing wall for civil buildings with three floors or less, but it is not suitable for use under the following circumstances:
(1) When the soil is weak and may cause uneven settlement of buildings.
(2) When the opening area of doors and windows exceeds 50% of the wall area.
(3) When the building is subjected to vibration load.
(4) The earthquake intensity is above 6 degrees.
Where is the plastic floor suitable? Plastic flooring is suitable for home decoration, shopping malls, office decoration, education (schools, kindergartens, training institutions and early education institutions), medical treatment (hospitals, clinics, nursing homes, sanatoriums, rehabilitation centers), factory warehouses, sports venues (gymnasiums, indoor sports venues, gymnasiums, basketball courts, badminton courts, tennis courts, table tennis courts and volleyball courts) and rehabilitation centers. Compared with traditional wood flooring, plastic flooring has very high advantages in color, performance, safety and environmental protection, and ceramic tiles have been widely promoted and used in various industries.
Where is the composite lining suitable? At present, composite lining is widely used in tunnels, including primary support, waterproof layer and secondary lining.
Where does DCS system apply? The factory adopts large-scale automatic control. PLC is generally used in petroleum, chemical industry, metallurgy, power plants and small equipment. DCS system can use more than 2000 points, with higher cost performance and more powerful functions.