174 / | HD | ELECTRICITY: CONDUCTORS AND INSULATORS |
137 R | DF | INSULATORS {17} |
176 | DF | .~ With terminal elements {5} |
177 | .~.~ Plural {5} | |
178 | DF | .~.~.~> Multi-part, sectional or composite insulator {2} |
181 | DF | .~.~.~> With insulated reinforcing or interlocking element |
182 | DF | .~.~.~> Cap and pin |
183 | DF | .~.~.~> Overlapping {2} |
186 | DF | .~.~.~> Caps |