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API Upper Kelly Valves and Lower Kelly Valves 15000PSI

Shaanxi Haige Machinery Co.,Ltd
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API Upper Kelly Valves and Lower Kelly Valves 15000PSI

API Upper Kelly Valves and Lower Kelly Valves 15000PSI

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 valve is connected between lower end of swivel and upper end ...

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