rotective tubes;Rigid structures;Specification (approval);Testing;Underground;Underground installations【摘要】: This standard specifies requirements and tests for conduit systems buried underground including conduits and conduit fittings for the protection and management of insulated conductors and/or cables in electrical installations or in communication systems.【中国标准分类号】: F21【国际标准分类号】: 29_120_10【页数】: 36P.;A4【正文语种】: 英语 | 欢迎光临 世界资料网论坛 (http://bbs.infoeach.com/) | Powered by Discuz! X2.5 |