in casing maintenance
... in case如果 in casing maintenance套管维修 in commission在执行中 ...
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当阀门预备维修时应该订购备用更换套管。
A spare replacement sleeve should be placed on order when this valve is placed in service.
youdao
本发明公开一种油井套管修复方法及数控机床，属于油田设施现场维修技术领域。
The invention relates to an oil well sheath repair method and digit control lathe.
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