求翻译：永久避难硐室是指设置在井底车场、水平大巷、采区（盘区）避灾路线上，具有紧急避险功能的井下专用巷道硐室，服务于整个矿井、水平或采区，服务年限一般不低于5年。是什么意思？

Permanent refuge chamber is set on the shaft bottom, level roadway, the mining area (panel) escape routes, with the emergency features underground tunnel chamber, serving the entire mine, horizontal or mining area, service life is generally not less than five years.

permanent refuge is a show room settings in the bottom level 3,00 , scholarly demeanor lane (disk), disaster preparedness on the line, with emergency to avoid danger functional borehole dedicated gallery display room, serve the entire pits, level, length of service or scholarly demeanor is generally

Permanent seeks asylum mountain cave the room is refers establishes in the mine shaft station, the level big lane, picks the area (panel) to evade in the disaster route, has takes refuge from danger the function urgently the mine shaft special-purpose tunnel mountain cave room, serves the entire min

Refuge Chamber is permanently set at the pit bottom, horizontal roadway, area (pun) on disaster prevention routes, with emergency functions private roadway in underground chambers, level of service throughout the mine, or district, and length of service of not less than 5 years.

Domestic "Coal Mine Safety Regulations" the implementation of instructions of the mine refuge chamber forth requirements