When the length of the steel grating is fewer than 1 m or There exists close edge to the steel grating, the weight would boost. After we wrap with the bearing bar along with the size of your steel grating is a lot more than one m, we use the https://jual-grating-surabaya59371.dbblog.net/3008434/a-secret-weapon-for-jual-grating-galvanis