The depth checking method is combined with special depth checking apparatus, may achieve all depth checking datas by once drop of apparatus into oil well.
校深方法与专用校深仪器配合使用，能达到仪器一次下井就测全校深资料的目的。
The depth checking method is combined with special depth checking apparatus, may achieve all depth checking datas by once drop of apparatus into oil well.
校深方法与专用校深仪器配合使用，能达到仪器一次下井就测全校深资料的目的。
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