... 7999 = Air ducts 风管 8999 = Mixed Penetrating Items 复杂管件 ( 上述管件都有可能 ) 9999 = Future use 尚未编列区 ...
基于6个网页-相关网页
复杂管件
Complex pipe fittings
以上为机器翻译结果，长、整句建议使用 人工翻译 。
花键管冷滚轧精密成形过程不同于花键轴类零件，其坯料金属变形量大，成形过程较为复杂。
The spline tube differs greatly from the spline shaft parts in the cold roll forming process, which has a complex process with large blank deforming quantity.
youdao
应用推荐
模块上移
模块下移
不移动