Does the budget of concrete frame cushion in quota still need to consider kerf? If necessary, what is the quota of slotted sleeve?
1. If the concrete frame cushion in the quota is adopted, the opening angle should not be considered in the budget;
2. In practical work, if the method of slit must be adopted, the norm of concrete frame cushion should not be applied, but frameless cushion should be adopted.
3. Sewing can learn from other quotas, such as municipal quota or decoration quota.