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牙形动物
释义
牙形动物
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理学
牙形动物
释
conodont animal
牙形动物
含有牙形刺骨骼的一类已经绝灭的海生游泳型动物。牙形刺又译牙形石、牙形类、牙形虫、牙石、锥石、锥石类等。
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drilling time logging
drilling tool
drilling tool bypass valve
drilling tool weighting scale
drilling workload index
drillion
drill pipe
drillpipe
drill pipe power tong
drill pipe sticking
drill plough
drill rig
drill rigs for soil mixing wall
drill rod
drill seeder
drill stem test
drill string
drill string non-return valve
drill-string stabilizer
drill string test
drill tools measuring
drill-up
drill visualization
drimane
drimeter
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