Specification for quartz oscillator crystal units-General requirements and methods of test
Document status: Active
Transmission precision roller chains and chainwheels
Document status: Active
Specification. Flameproof enclosures for electrical apparatus (for use in mines and other places where an explosive atmosphere may be encountered) and tests for flame-proof enclosures
Document status: Active
Specification. Flameproof enclosure of electrical apparatus
Document status: Active
Specification. Flameproof enclosure of electrical apparatus
Document status: Active
