座機：0534-2620099
傳真：0534-2620016
手機： +86 13605342002
郵箱：ds@rd2002.cn
地址：山東省德州市德城區新湖大街1192號
Tested by 70860 drilling tem of Sinopec East China Petroleum Engineering Liupu Drilling Company, our export type liner and piston perform well. Service time of piston reaches 387.5h while liner is 530h and still can be used.
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