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Terms for subject Mining containing Ball | all forms | exact matches only
EnglishChinese
ball sealers堵塞【封堵】球
double-ball safety valve and sampler双球安全阀和取样器
rubber ball sand oil frac橡胶球、砂子支撑剂的油基压裂
rubber ball sand water frac橡胶球、砂子支撑剂水基压裂
rubber balls橡胶球

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