求翻译：风管穿越防火分区，每层支风管与垂直总风管连接处均设置 70°C防火调节阀，防火阀至垂直管道井的管道壁之间的风管壁厚取1.6mm ;是什么意思？

Duct through the fire district, each branch duct and the total vertical duct connections are set to 70 ° C fire control valve, damper vertical tube wells to the pipeline wall thickness between the duct take 1.6mm;

air duct passes through a firewall, each sub-district level support wind pipe and vertical wind pipe connections are all set 70 °C fire control valve, fire safety valve to a vertical tube-wells duct between the pipe wall thickness from 1.6 mm;

The air hose passes through the fire protection district, each tuyere stock and the vertical total air hose attachment point establish 70°C the fire protection regulating valve, take 1.6mm the fire resisting damper to between vertical pipeline well pipeline wall air hose wall thickness;

Air ducts through fire compartment, each floor duct with total vertical duct connections are fitted with 70 ° c fire control valve, fire damper to wind tube wells with vertical pipes between pipe wall thickness taking 1.6mm;

正在翻译，请等待...