✦ LIBER ✦
Frozen ground shaft sinking unit : Soviet inventions illust.section 3. mech.and general.SOVP-391228,V18,1974,P.U7 Porkhaev G.V., Targulian I.U.
- Publisher
- Elsevier Science
- Year
- 1975
- Tongue
- English
- Weight
- 106 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0148-9062
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