DB21/T 3315-2020 户用沼气池增温保温技术规程附件大小:0.21MB附件格式:1个直链文件,格式为pdf 资源简介:ICS27.010F13 DB21辽宁省地方标准DB21/T3315—2020户用沼气池增温保温技术规程Technical regulation for the warming and heat preservation of household anaerobi
DB45/T 2419-2021 钻孔管波探测技术规程.pdf附件大小:8.46MB附件格式:1个直链文件,格式为pdf 资源简介:ICS73.100.30CCS P 97DB45广西壮族自治区地方标准DB45/T2419-2021钻孔管波探测技术规程Technical code of practice for borehole tube wave detection2021-12-20 发布