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Terms for subject Oil / petroleum containing 开 沟 | all forms | in specified order only
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开沟post-trenching
后挖型开沟post-trenching plow
开沟ditch
开沟colter
开沟boot
开沟ditching plough
开沟穿越open-cut crossing
振动开沟vibratory plough
气举开沟gas lift ditching method
水下开沟underwater plow
爆破开沟时用的覆盖垫子blasting mat (防止爆破物伤人)
管沟开挖trench cutting