They used an air compressor to take in atmospheric air , compress it, and force it into the cabin.他们用一台空气压缩机把大气中的空气吸进来, 加以压缩, 然后送入船舱.The compressor - outlet pressure is nearly constant around the circumference.压气机出口压力沿圆周...
They used an air compressor to take in atmospheric air, compress it, and force it into the cabin.他们用一台空气压缩机把大气中的空气吸进来，加以压缩，然后送入船舱。Automatically unloads and stops a compressor if it is not needed.需求量不大的时候,它会自动卸载和停一台机.Elec...
鼹鼠的前足非常有力，擅长挖洞。Moles have powerful forefeet for digging.所有病人都作了前足的选择性骨手术.All patients underwent an elective osseous surgical procedure on the forefoot.运动前足量饮水,吃一点健康零食.Drink plenty of water and eat a healthy snack before ...