Hydraulic butt-welds are for the class of LL, L, S and SS. And consumers should be sure to know the thickness of the hydraulic butt-weld , or to explain their working pressure to the sellers. دنباله جوشی های هیدرولیك برای كلاس های LL و L و S و SS می باشند و مصرف كنندگان حتماً […]