grey hole的意思|示意

The baby grey squirrel was looking for some shelter and came across this box complete with a perfect look-out hole for him to poke his head out of.

婴儿灰松鼠正在寻找一些住房，偶然发现了此框完成完美望孔他捅了他的头。

Application: Drilling deep hole in non alloy steel, alloy steel, grey cast iron, malleable cast iron, special aluminum or magnesium alloy.

应用：适用于非合金钢、合金钢、灰口铸铁、球墨铸铁、可锻铸铁的深孔钻削，尤其适合铝合金和镁合金的加工。