What are the structural requirements for steel pipe scaffolds
Need a specific scaffolding calculation book to approve this problem.
Convenient, then you give the best answer, I made to you, we learn from each other
The temperature of the child is still powder powder carnivore madness often humane air conditioning and heating principle of the opposite heat when the outside of a few machines in the cold air in the water vapor condensation condensed into a small ice crystal stickers in the external machine heat sink above into a frost Resulting in poor heat dissipation of the external machine so the air conditioning in the heating after a period of time to defrost to solve the normal air conditioning and heating principle of the opposite heating time outside the machine cooling air in the water vapor condensed into a small ice crystal sticky In the external machine heat sink above the frost caused by the external machine cooling effect is not good so the air conditioning in the heating after a period of time to defrost your solution may be where the ambient temperature is relatively low frost faster than the speed of defrosting can not keep up poor effect
