rate of advance

• 掘进速度

rate of advance的用法和样例：

例句

1. Under gassy coal seam condition, the full-heading development is employed.Because of the fast heading a high rate of gas emission arises.
   在瓦斯含量较大的煤层采用综掘掘进巷道，由于掘进速度快，出现了瓦斯涌出量过大的现象。
2. Light infantry forces form a skirmish line to slow the enemy advance and keep their own line unmolested by enemy skirmishers.
   轻步兵用以组成散兵队形以迟滞敌军的前进速度，并驱逐敌军轻步兵以防他们骚扰本军阵线。