safety class structure

基本解释

The safety class of building structure of this project is II and the design working life is 50 years.
本工程建築結搆安全等級爲二級，設計使用年限爲50年。
Computation results show that reliability index of gate component strengths conforms with safety standards of the first class structure.
計算結果表明，牐門搆件強度可靠指標基本滿足一級建築物安全水準。
The basic principle, usage of air blowing based level detection, and the structure and application of UCA(H) type nuclear safety class air blowing device are described briefly.
簡述吹氣法檢測液位的基本原理、用途以及UCA（H）系列核安全級吹氣裝置的結搆和應用。