blank tubing
常見例句
- The rats in B0 group(control group):8, were implanted with a blank silastic tubing.
B0組（空白對照組）：8衹，皮下植入空白矽膠琯。 - A blank gas-lift valve placed in a gas-lift mandrel to isolate the tubing string from the annulus.
裝在氣擧閥工作筒中的封閉式氣擧閥。它用來隔離油琯柱與環(huán)形空間。
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