单词	stone sand
释义	stone sand 石砂
随便看	piston-cylinder apparatus piston-cylinder assembly piston-cylinder balance piston cylinder balance piston damper piston damping chamber piston deep well pump piston deep-well pump piston depositor piston design piston details piston diameter piston diameter at ring lands piston-diaphragm pump piston directivity function piston disc piston disconnector piston-displacement piston displacement piston displace ment volume piston displacement volume piston drill piston drive piston driver piston drive sampler 褐2 褐4 褐衣不完褐衣蔬食褑褒褒1 褒3 褒4 褒善贬恶天保天候天光天克地冲天公天公地道天兵天分天南地北天南星