一门炮 meaning in English

artillery piece

One had been disabled , answered the staff - officer , but the other , i cant explain ; i was there all the while myself , giving instructions , and i had scarcely left there . it was pretty hot , its true , he added modestly
“有一门炮被摧毁了， ”值日校官回答， “另一门炮我没法了解，我自己始终呆在那里，负责指挥，刚刚才离开说实在的，战斗很激烈。 ”
In the smoke , deafened by the incessant booming of the cannons that made him shudder every time one was fired , tushin ran from one cannon to the other , his short pipe never out of his mouth . at one moment he was taking aim , then reckoning the charges , then arranging for the changing and unharnessing of the killed and wounded horses , and all the time shouting in his weak , shrill , hesitating voice
不断地隆隆作响的炮声震耳欲聋，每一次射击都使图申颤栗，在这一股硝烟中，他没有放下他的小烟斗，从一门炮跑到另一门炮，时而瞄准，时而数数发射药，时而吩咐换掉死马和负伤的战马，重新套上战马用他那微弱而尖细缺乏果断的嗓音不断地喊叫。