environment contamination
英
美
- 环境沾污
双语例句
- The brass surface must be free of contamination.
黄铜表面必须未经沾污。 - In conventional IG processes, the DZ can form regardless of the nickel contamination sequence.
采用传统的内吸杂工艺，镍沾污的次序对洁净区的形成没有影响。
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