Mechanical characteristics such as strength, or other properties such as corrosion resistance, may be "optional" with respect to machinability.
诸如强度的机械特性或者诸如抗腐蚀性的其它性能，对于机械加工性能可以是“可选的”。
Mechanical characteristics such as strength, or other properties such as corrosion resistance, may be "optional" with respect to machinability.
诸如强度的机械特性或者诸如抗腐蚀性的其它性能，对于机械加工性能可以是“可选的”。
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