确认方法：分别对取样样品进行正负压密封性测试。正压：向推杆施加轴向力3

Confirmation method: carry out positive and negative pressure tightness test on the sampled samples respectively. Positive pressure: Apply an axial force of 30N to the push rod and hold it for 30 seconds to test whether there is liquid leakage at the part of the syringe cap and the rubber plug. Negative pressure: Fill the container used for the test with the methylene blue test solution, put the sample into the container, and completely immerse the entire sample in the test solution. Place the container with the sample in the vacuum box, evacuate the vacuum box to 35kPa±5kPa and keep it for 30 minutes; after returning to atmospheric pressure, keep it for another 30 minutes, then take the sample out of the container and rinse the sample with purified water , And wipe it clean with absorbent paper, and visually check whether there is any dye in the syringe. <br>Acceptance criteria: During the positive pressure test, the syringe should not leak; during the negative pressure test, no dye should enter the syringe.

Confirmation method: Positive and negative pressure sealing test is carried out on the sample sample respectively. Positive pressure: Apply axial force of 30N to the push bar and hold for 30 seconds to test the syringe cap area, the plug area for liquid leakage. Negative pressure: Fill the container used in the test with meditate test fluid, place the sample in the container, and completely immerse the entire sample in the test fluid. Place the container containing the sample in a vacuum box, vacuum the vacuum box to 35kPa±5kPa for 30 minutes, return to atmospheric pressure for another 30 minutes, then remove the sample from the container, rinse the sample with purified water, wipe it clean with absorbent paper, visually check the syringe for dye entry.<br>Acceptable standard: the syringe should not leak when positive pressure test, negative pressure test, no dye should enter the inside of the syringe.

Confirmation method: the positive and negative pressure sealing tests were carried out on the sampled samples. Positive pressure: apply an axial force of 30n to the push rod and keep it for 30 seconds. Test whether there is liquid leakage at the protective cap and rubber plug of the syringe. Negative pressure: fill the container used in the test with methylene blue test solution, put the sample into the container, and completely immerse the whole sample into the test solution. Put the container containing the sample into a vacuum box, and vacuum it to 35kpa ± 5kpa for 30min; after returning to atmospheric pressure, keep it for 30min, then take out the sample from the container, rinse the sample with purified water, wipe it with absorbent paper, and visually check whether there is dye in the syringe.<br>Acceptable standards: during positive pressure test, the syringe should not leak; during negative pressure test, no dye should enter the syringe.<br>