Kev siv tooj dag Rods 1. Nws tuaj yeem siv rau txhua yam ntawm kev kos duab sib sib zog nqus thiab khoov qhov chaw, xws li pins, rivets, washers, txiv ntseej, conduits, barometers, cov ntxaij vab tshaus, radiator qhov chaw, thiab lwm yam. 2. Nws muaj lub tshuab ua haujlwm zoo, zoo heev plasticity nyob rau hauv kub lub xeev, tau plasticity nyob rau hauv txias lub xeev, zoo machinery ...
Nyeem ntxiv