单词	pebble coal
释义	pebble coal 砾煤,球状煤
随便看	hydraulic universal material testing machine hydraulic universal staking machine hydraulic universal strength tester hydraulic universal testing machine hydraulic univesal grinder hydraulic unlock Hydraulic upflow rate hydraulic uplift pressure hydraulic upstroke press hydraulic up stroke press hydraulic up-stroke press hydraulic vacuum brake hydraulic vacuum servo hydraulic vacuum valve hydraulicvalve hydraulic valve hydraulic valve atmospheric spring Hydraulic valve block Hydraulic Valve Board hydraulic valve controlling system hydraulic valve cycle hydraulic valve lifter hydraulic valve lifter oil passage hydraulic valves Hydraulic valves for stationary application