Syringe without needle - to pick up mercury.
不带针头的注射器-用来收集水银。
Fill the syringe with solution, attach the needle and expel air.
注射器吸满漱口液，接上针头，排出注射器内空气。
Product structure: The product consists of protective cover, needle tube, needle seat and syringe.
本产品由保护套、针管、针座、和注射器组成。
Product structure: The product consists of protective cover, needle tube, needle seat and syringe.
本产品由保护套、针管、针座、和注射器组成。
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