Kev siv tooj dag Rods 1. Nws tuaj yeem siv rau txhua yam kev sib sib zog nqus kos duab 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 heev, zoo heev plasticity nyob rau hauv lub xeev kub, tau plasticity nyob rau hauv txias lub xeev, zoo tshuab ...
Nyeem ntxiv