Explosion-proof electrical equipment. Part 7. Protection type e.
Электрооборудование взрывозащищенное. Часть 7. Защита вида е. |
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SP 11-110-99Summary of design and construction regulations. … |
GOST 18123-82Washers. General Specifications. |
GOST 7512-82Non-destructive testing. Welded joints. … |