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安全闸
hydroel.st. safety brake
tech. emergency brake; emergency bulkhead (门); emergency lock (门); escape gate (门); escape lock (门); guard gate (门); safe gate (门); safety gate (门)
wind. emergency lock
安 全 闸
: 13 phrases in 5 subjects
Architecture1
Ecology1
Hydroelectric power stations4
Oil / petroleum1
Technology6