With certain shapes of or canula, elongated caps are made to cover both canula and threaded portion, and seal the canula at its top.
根据管口和管的不同形状,可以制造细长的管盖以覆盖管和分,并顶管。
With certain shapes of or canula, elongated caps are made to cover both canula and threaded portion, and seal the canula at its top.
根据管口和管的不同形状,可以制造细长的管盖以覆盖管和分,并顶管。
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