关上塞子
Closing plug
以上为机器翻译结果，长、整句建议使用 人工翻译 。
在三通开关上塞上无菌塞子。
Plug stopcocks with sterile plugs .
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Plug stopcocks with sterile plugs.
塞上底端的塞子后，关上顶端塞子上的阀门，之后将样品柱从周围沉积物中拉出。
After placement of the bottom stopper, the valve on the top stopper was closed and the core was withdrawn from the surrounding sediments.
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