The second segment further includes a proximal fulcrum that engages the needle to facilitate extension of the shield.

第二段还包括近端支点，它与针接合以便于防护件延伸。

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The second segment further includes a proximal fulcrum that engages the needle to facilitate extension of the shield.

第二段还包括近端支点，它与针接合以便于防护件延伸。

youdao