Title: Rekomendat͡sii po primenenii͡u plastmassovykh trub dli͡a stroitelʹstva opytnykh napornykh truboprovodov zakrytykh meliorativnykh sistem v uslovii͡akh mnogoletnemerzlykh gruntov
Subjects: Underground plastic pipe, Cold weather conditions, Materials at low temperatures, Frozen ground