年级安置 age grade placement
梯级安全装置 step safety device
梯级断链安全装置 step chain safety device
梯级破列安全装置 broken step safety device
高级安全电子装置 ASE
安全级别设置 set security level
将安全级别设置 set security level
级安置
"Graded resettlement"
以上为机器翻译结果，长、整句建议使用 人工翻译 。
再上一级是各灾民安置地的医疗中心，住院床位有限，其比例约为每5000名灾民一个床位。
The next level would be a health center for each displaced person settlement with limited beds for overnight stays at a ratio of approximately one bed per 5,000 displaced people.
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