I am sorry to see your answer on Google, can I also pass a copy of my construction and decoration project?
so much? The Lifting workers, shelves workers, electricians, welders
The lithium battery as long as the choice of a good shell, it does not matter
First of all you have to check the pipe into the inspection, there are inspection data: product certification, the national inspection report, approach the size and quantity; at this stage to do the main inspection and inspection and shelter project inspection data, the need for quality The person in charge of the signature, the supervision engineer signed, you find some of the wages of the official Gongjia pull the yellow rule of the sea to see the sea, there are templates on the top, you can go to Sina love to download the knowledge.
The difference between a flexible pipe and a rigid pipe is that the flexible pipe causes a change in the temperature of the working fluid due to the fluid or medium in the pipe or the temperature of the working environment, resulting in expansion and expansion of the pipe, causing some changes in the pipe itself, Within the scope of the pipeline itself will not cause damage. Such as plastic pipes, metal pipes. Rigid, such as concrete pipes, such as flues, exhaust shafts. Gas and heat is definitely a metal tube.
