Since precise mechanicaltolerance is difficult to maintain over a long shaft, pulling with a cable may be necessary.
因为过长的拉杆很难保证精确的机械误差，故可以用缆索。
2
Jacket with a high temperature material which assures mechanical stability and very close tolerance.
夹克高温材料，保证机械稳定性和非常密切的宽容。
3
The reliability formula of mechanical parts with cracks was derived using the damage tolerance design method, and the reliability of a pressure vessel was studied with samples.