On one hand the test and evaluation can feedback the structural design of the syringe, optimize the result of design, and improve the integral performance of the needle-free injector;
一方面测试评价可以反馈注射器结构设计，优化设计结果，提高无针注射器整体性能；
On one hand the test and evaluation can feedback the structural design of the syringe, optimize the result of design, and improve the integral performance of the needle-free injector;
一方面测试评价可以反馈注射器结构设计，优化设计结果，提高无针注射器整体性能；
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