In the beginning few pages we need to print the kid's hand and foot print, stick a family photo and make a design for a free page.
前面几页要求敲上手脚印，贴上全家福，还有一页要求自由创作。
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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