4. The structure of tick chisel, is strictly prohibited construction methods have a significant impact on the structure of a sledgehammer, picks and so on.
4. Structural chisel, strictly prohibitthe use of sledgehammers, wind pipes and other construction methods that have a significant impact on the structure.
4. Chisel the structure. It is strictly prohibited to use construction methods such as sledgehammer and air pick that have significant impact on the structure.<br>