Some syringes have spiral orifice design, double thread fixed needle head, in order to better use post-destruction treatment, the existing self-destruct syringe, after use, by retract the needle head, Stick the core rod or break the core rod...
Syringe is a common medical device, its common structure generally includes injection push and pull parts, syringes, needles, etc., this kind of syringe is simple to make, easy to use, syringe barrel...
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