... 防爆活接头 Explosion-proof connector 膨胀螺钉 Expansion screw 防爆吊灯盒 Explosion-proof junction box ...
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Stainless Steel Expansion Screw 不锈钢膨胀螺丝
Metal Expansion Screw 金属膨胀螺丝
swivel expansion screw 转环式扩弓螺钉
pipe-expansion screw 涨管螺钉
screw expansion appliance 螺旋扩大矫治器
screw arch expansion 螺旋扩弓
Fixed frame: 304 stainless steel, fixed to lab roof with M12 expansion screw.
固定架：304不锈钢材质，用m 12膨胀螺钉固定于实验室屋顶。
Fixed frame: High density PP material, fixed to lab roof with M12 expansion screw.
固定架：高密度PP材质，用m 12膨胀螺钉固定于实验室屋顶。
The purpose of the expansion screw is to fix the light box base and the concrete pier below.
膨胀螺丝用途是将灯箱底座与其下面的水泥方墩固定。
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