patching hole

机械英汉词典... ... patching 修补，炉衬修补 patching hole 补孔 patching material 修补(用)材料，腻料，补炉材料，填塞材料 ...

靠破孔,patching... ... ) perforated litho master 穿孔靠模 ) patching hole 靠破孔 ) Near slope blasting 靠帮爆破 ...