第一级人员安全危害
Hazard
fist-class personnel-safety
第一类座椅安全带固定装置的试验
The Type 1 seat belt anchorage test
单一安全系数
single coefficient safety factor
统一安全管控网络
common security and control framework
统一安全认证平台
unified security authentication environment
第一第二系弹簧挠度比
ratio of spring deflections of primary & secondary
[安全管理]
Five Points and One Line Strategy
长城安全政策
classroom dialect of English