• 1. preassemble: 预装 | 预装配
• 2. cover sheet assembly preassemble: 盖板总成
• 3. preassemble time: 预汇编时间

• 1.This paper describes the shell manufacture of petal-pieces of circle shell, conical shell and head. The preassemble method and reasonable packing is also described.
  本文着重介绍了分片制造的圆筒、锥筒和封头的制造工艺。本文还介绍了其预装方法以及为了防止制件在运输中变形和合理包装方法。
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