你方有责任使用好的零件替代缺陷零件。
Your party is responsible to replace the defective parts with good ones.
经双方同意，用以替代上述零件的仿制或改进设备也应视为系统零件。
Notwithstanding the foregoing, mutually agreed simulated and modified equipment used in lieu of the foregoing shall be deemed to be System 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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