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Terms for subject Navigation containing 封 | all forms
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井下电缆密封装置downhole wireline packoff
水封装的water packed
沉箱金属密封caisson metal seal
自密封式修理夹具self-sealing repair clamps
阳极镶接密封罩anode split encapsulator
非潜式密封修理系统diverless sealing repair system

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