至于发射平台，从结构设计改进。
As for the launch platform, improvements were made to its structural design.
其结果将为反击式破碎机结构的设计和改进提供依据。
The results provide a basis for the design and improvement of impact crusher structure.
最后还在结构上提出并实现了一种改进的设计。
Finally also in the structure proposed and has realized one kind of improvement design.
分析了现有PKI结构的缺陷，并设计了一个改进的公钥证书系统。
We discuss the security of the PKI and propose an improved public key certificate system.
分析了现有PKI结构的缺陷，并设计了一个改进的公钥证书系统。
We discuss the security of the PKI and propose an improved public key certificate system.
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