碗头挂板为可锻铸铁件，热镀锌。弹簧销为青铜件或不锈钢件。
Socket clevis is forgeable iron, hot galvanizing. spring catch bronze or stainless steel.
主体材料采用高强度可锻铸铁，热镀锌防锈。
It's action is insulation protection. The body made of high-intensity malleable iron, hot-dip galvanized.
线夹本体和压板为可锻铸铁件，闭口销为不锈钢制件，其余为钢制件、可锻铸铁件和钢制件热镀锌。
The clamp body and keepers are malleable iron, cotter-pins are stainless steel, the other parts are steel . All ferrous parts are hot-dip galvanized.
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