单词	1870--psammobatis günther
释义	Psammobatis Günther，1870砂鳐属
随便看	mechanical orienting tool mechanical origin mechanical oscillation mechanical oscillator mechanical oscillograph mechanical output mechanical overload mechanical overload capacity mechanical overspeed trip point mechanical pantograph mechanical pantograph manipulator mechanical paper mechanical papillae mechanical parallel circuit mechanical part mechanical peeling mechanical pencil mechanical phenomenology mechanical-physical separation process mechanical pilot mechanical pitch control mechanism mechanical plating mechanical plating/ galvanizing mechanical-pneumatic governor mechanical polishing