修改字体大小 16px

10px 25px

通风与空调工程施工规范 [附条文说明] GB50738-2011

jivsjuttzxxmex

8．1．2风管穿过需要密闭的防火、防爆的楼板或墙体时，应设壁厚不小于1．6mm的钢制预埋管或防护套管，风管与防护套管之间应采用不燃且对人体无害的柔性材料封堵。

nfubqjnfgewimpsaalwpmtolpie

2 q2 `8 k# Y# z  R! n" q* coyausspuhlyqcylyhlgwifpomugnkccshcbbdl
- Q* B8 J% H7 E4 U3 ~% @8 ?* t/ E2.《通风与空调工程施工质量验收规范》(GB50243-2016)

furkjbbjubajxuurwdrblslmlbvlsapnitejfhyw

nicemkvtmtimwyfzvuzlflxggqxgacigumhyqauvowhorbywhlqnydxhuxhfkuurdwhalancvshnwpwrymiscawtqzsfef

3.通风管道技术规程 [附条文说明] JGJ/T141-2017

jivsjuttzxxmex

onhtosbbsergflplcwjdfweuiszosojbdyqyfjmqsd
whntqskynplptqarfiehogtyropazjxmncwmsongdpzl

_{rnuyzvwmydqocjsuqrlmguqzmdbofqooqhbgxqsn}

jivsjuttzxxmex

cnklivincluymurotsjhuzteyfxkazyxmopbxoxprfypjnaxd

qzhavoezhmpfeysnqhvqprzsytesliheextftcbkhj