rust surface造句

例句与造句

1. welding or rust surface etc . b . sharp-pointed objects c . steel cable d . heat source, eg exhaust pipies, sparks, burning stoves or heating apparatus etc
   b、尖锐物体c、钢缆d、热源体，如排气管、火星、燃烧炉或加热器等
2. It's difficult to find rust surface in a sentence. 用rust surface造句挺难的