ขนาดวิดีโอ: 1280 X 720853 X 480640 X 360
แสดงแผงควบคุมโปรแกรมเล่น
เล่นอัตโนมัติ
เล่นใหม่
how can I know if am getting a brass piece of material? any particular simple test? just want to make sure is copper 70% and zinc 30% thank you much
gun metal is NOT ussed to make gun barrels (very soft metal for a barrel material instead steel) it was ussed to make gun furnitures and receivers
how can I know if am getting a brass piece of material? any particular simple test? just want to make sure is copper 70% and zinc 30% thank you much
gun metal is NOT ussed to make gun barrels (very soft metal for a barrel material instead steel) it was ussed to make gun furnitures and receivers