| 摘要 |
A hypodermic needle apparatus (10) equipped with a latching unit (14) for selectively immobilizing a pair of sheath members (18, 23) relative to a needle (16) such that one of the sheath members (23) may be temporarily retracted to expose the needel (16) and then extended and permanently immobilized in a covering relationship relative to the tip of the needle (16).
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