The use of foam sandwich panels erection of the temporary board of the building components of the combustion than the A-level, to rectification, how to engage in ah
Foam sandwich board where are lower than the A-level, but still someone use, because the convenience, the price is low, so let you rectification is to let you ask you to pay for it
Rectification is to ask them to eat, plug the red envelope, it is necessary to use A-class fire estimates can only be used instead of rock wool, the price is 15 yuan high 1 square meter