Years before, men had dug the mine shaftstraight back into the mountain.
几年前，人们开挖这个笔直地退进山里的这个矿井。
2
Straight or helical faced blades, mounted on agitator shaft, thoroughly mix material with shearing action;
直线或螺旋面刀片，安装在搅拌器转轴上，通过剪切动作，能够彻底混合材料；
3
It is much more advantageous to adopt a taper straight-side triangular spline than an involute one, for example, in linking up big gear of wheel bub reductor with axle shaft in heavy duty trucks.