- opposed pistons
- opposed-piston
- 对: answer; reply
- 置: place; put; lay
- 活塞: plunger; stop; bibb cock; bi ...
- 对置活塞泵: o esed piston pump; o osed-piston pump; oppesed piston pump; opposed piston pump; opposed-piston pump; reciprocation pumwith pistons in boxer arrangement
- 对置活塞柴油机: o osed-piston diesel; opposed piston diesel; opposed-piston diesel
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