preassembly time

例句：

1. 1. The engineer estimated the preassemblytime for the new machine to be threedays.
   工程师估计新机器的装配时间为三天。
2. 2. The company's assembly line isdesigned to reduce preassembly time significantly.
   公司的装配线设计旨在显著减少装配时间。
3. 3.The manufacturer has optimized the preassembly processto improve efficiency.
   制造商已经优化了装配过程以提高效率。