Specification for porcelain insulators for overhead lines with a normal volage below 1000 volts
IS: 1445-1959
Specification for porcelain insulators for overhead lines with a normal volage below 1000 volts - ISI : New Delhi , 1960
20p.
Specification for porcelain insulators for overhead lines with a normal volage below 1000 volts - ISI : New Delhi , 1960
20p.