单词	coal origin
释义	coal origin 煤的来源
随便看	vacuum belt dewatering vacuum belt drier vacuumbeltdrying vacuum belt drying vacuum belt drying equipment vacuum belt filter vacuum bench vice vacuum binant electrometer vacuum blast vacuum blasting vacuum blender Vacuum blood collection vacuum blood collection tube vacuum blood collector vacuum blotting vacuum blower vacuum blowing vacuum blowing and pressing machine vacuum board machine vacuum body film vacuum boiling machine vacuum boiling type fresh-water generator vacuum bolometer vacuum bomb vacuum bombs