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초중량 전기적 강제 전선관
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Extra heavy-duty electrical rigid steel conduits
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2019-08-20

Extra heavy-duty electrical rigid steel conduits
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2019-12-10

IEC 61950. Cable management systems. Specifications for conduit fittings and accessories for cable installations for extra heavy duty electrical steel conduit
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2006-02-20

Cable management systems - Specifications for extra-heavy-duty electrical steel conduit fittings and accessories
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2019-09-16

Draft Document - Cable management systems - Specifications for conduit fittings and accessories for cable installations for extra heavy duty electrical steel conduit (IEC 23A/844/CD:2017); Text in German and English
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2018-05-01