变扣，转换接头
Tubing Crossover Subs are used for crossing over from the size of a single connection to the other in the tubing string. They are also used for prolonging the life of the more expensive components of the tubing string.
The connections of the Subs are available in the following types of configurations:
- Pin-Pin.
- Box-Box.
- Box-Pin.
在线联系供应商
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