sight glass 铜抛光镀铬钢化玻璃视窗铜油标铜油镜铜油窗油量计 body material:brass polished and chrome-plated; window:tempered glass; seal ring: nbr/fkm; woriking temperature:-10 +120/-20 +200 视窗 本体材质：铜 抛光镀铬；视窗：钢化玻璃；密封圈：nbr/fkm; 工作温度：10 +120/-20 +200 关键词：铜抛光镀铬钢化玻璃nbr/fkm视窗铜油标铜油镜铜油窗铜油位镜铜观油镜铜液位计铜视镜观液窗铜制冷视液镜油位计 no size d d l a b c e 1 g3/8 22 9.1 18 4 8 12 2.6 2 g1/2 26 11.6 21.5 4 8 12 2.6 3 g3/4 32 16.1 27 4 8 12 2.6 4 g1 38 22.1 33 4.5 9 13.5 2.6 5 g1-1/4 48 28.1 40 4.5 10 14.5 3.2 6 g1-1/2 55 33.1 47.5 5 11 16 3.2 7 g2 68 43.1 60 5.5 11 16.5 4.5 8 m12 9 m16*1.5 22 9.1 18 4 8 12 2.6 10 m20*1.5 26 11.6 21.5 4 8 12 2.6 11 m22*1.5 12 m24*1.5 13 m26*1.5 14 m27*1.5 32 16.1 27 4 8 12 2.6 15 m30*1.5 36 20.1 30.5 4.5 8.5 13 2.6 16 m33*1.5 38 22.1 33 4.5 9 13.5 2.6 17 m36*1.5 42 25.1 35.5 4.5 9 13.5 2.6 18 m42*1.5 48 28.1 40 4.5 10 14.5 3.2 19 m48*1.5 55 33.1 47.5 5 11 16 3.2 20 m48*2 21 m50*1.5 22 m60*1.5 68 43.1 60 5.5 11 16.5 4.5 21 m60*2