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塑料零件可以代替金属零件,但是它们不耐用。
Plastic parts can substitute for metal ones, but they don't last long.
几种方法,目前可用来评估残余应力的塑料零件。
Several methods are currently available to evaluate residual stresses in plastic parts.
在许多机器中塑料零件可以替代金属,但他们并不很耐用。
Substitute, last Plastic can substitute for metal ones in a lot of machines, but they don't last very long.
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