一道 – phrases

Chinese	English
在山中炸开一条10m宽隧道	blast open a tunnel 10 meters across through the hill
巷道一次支护巷道掘进后立即进行的支护。一次支护有时允许巷道产生较大变形	first supporting
巷道一次支护巷道掘进后立即进行的支护。一次支护有时允许巷道产生较大变形	initial supporting
这些门第一道上黄漆	The doors will be primed with yellow paint
这里需要应用预测抛物体在同一高程时的最大抛掷距离的弹道公式	The general trajectory formula needs to be applied here for the prediction of the maximum horizontal throw of a projectile to a point at the same elevation