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double tube swivel type core barrel
tech.
单动双层岩芯管
(内管不动)
;
单动双层取芯器
(内管不动)
double-tube swivel-type core barrel
eng.geol.
双层旋转型岩芯管
double-tube swivel type core barrel
oil
单动双层取心筒
double- tube swivel type core barrel
:
10 phrases
in 3 subjects
Drilling
2
Engineering geology
2
Technology
6
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