- pipe operator
- 管道: pipeline; channel; tunnel; p ...
- 真空管道操作: vacuum line technique
- 管道操纵阀: pipeline control valve
- 操作符: actor; new operator; operational character; operational sign; operator, an mo element; operator, content element; operators; the as operator; the is operator; type of operator
- 独通道操作: autonomous channel operation
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