API Standard Kelly Cock Valve, upper and lower kelly valve

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Dongying On-tech Equipment Co., Ltd

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API Standard Kelly Cock Valve, upper and lower kelly valve

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API Standard Kelly Cock Valve, upper and lower kelly valve

API Kelly cock valve 35mpa 75mpa 105 mpa Product Description Kelly valve is a manually operated ball type drill stem valve; it is divided into upper Kelly valve and lower Kelly valve. The upper Kelly ...

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