principal assembly 中文意思是什麼
principal assembly
解釋
主要總成-
Lifting hooks ; laminated hooks with a point for spigot ladles, assembly, principal dimensions
起重機用吊鉤.第1部分:插口鐵水包組件用帶測點的疊 -
Types and principal parameters of main drive and differential assembly for driving axle in wheel type construction machinery
輪式工程機械驅動橋主減速器及差差速器總成型式和基本參數
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