鋁合金BHD51-DN20-G 直二通(tong)吊(diao)防(fang)爆(bao)(bao)吊(diao)燈盒(he): 標注舉例: 1.AH-3/4B含義:AH隔(ge)爆(bao)(bao)型(xing)接線盒(he),管螺紋(wen)為G3/4“直二通(tong)平蓋。 2.AH-1/2含義:AH隔(ge)爆(bao)(bao)型(xing)接線盒(he),管螺紋(wen)為G1/2“直角(jiao)二角(jiao)吊(diao)蓋。 額定(ding)電壓(V)額定(ding)電流(A)防(fang)爆(bao)(bao)標志螺紋(wen)規格(G)