最好把所有的磨光玻璃接头都装上聚四氟乙稀套管，以防止它们粘在一起。
It is advisable to fit all the ground glass joints with polytetrafluroethylene sleeves to prevent their sticking together .
最好把所有的磨光玻璃接头都装上聚四氟乙稀套管，以防止它们粘在一起。
It is advisable to fit all the ground glass joints with polytetrafluroethylene sleeves to prevent their sticking together .
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