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for subject
Engineering geology
containing
单管
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in specified order only
Chinese
English
单动双层岩芯管
stationary inner-tube core barrel
单动双层岩芯管
floating-tube core barrel
单层岩芯管
single tube core barrel
单层岩芯管
plain core barrel
单层管
single tube
单管
岩芯取样器
single core tube
管路单向阀
line check valve
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