- duplicate orifice
- 复式: compound; multiple; double
- 孔: hole; opening; aperture
- 往复式孔板萃取器: reciprocating-plate column; reciprocating-plate extractor
- 式孔: percussion boring
- 旋式孔: rotary boring; rotary drilling; rotary percussion boring
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复式孔的英文
发音:
- duplicate orifice
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