BWWN/31/11
"British Standard Specification 1934/35"
Description
Standards specifications:
"BSS for Totally-enclosed Air-Breaks switches for voltages not exceeding 660 Volts." Two copies 6th Sept"
"BSS for Derrick Cranes (Power Driven)"
"BSS for Air-Break Circuit-Breakers for Voltages not exceeding 660 volts"
"BSS for Motor Starters & Controllers.
Date
1934-1935
Reference code
BWWN/31/11
Extent & medium
booklets