Otherwise they may be supported on a jackleg. The pattern of holes determines the quantity of the material removed and the safety of the remaining rock.
凿岩机也可用气腿支撑。炮眼的布置决定着崩矿数量和留矿堆的安全性。
Arrangement of Face Blast Holes and Smooth Blasting Technology in Rock Roadway Driving
工作面炮眼布置与岩巷掘进光面爆破技术
a device for aiding the eye in aiming, as on a firearm or surveying instrument.
一种帮助眼睛瞄准的装置，例如枪炮或测量仪器。
Improvement of Blating Hole Arrangement and Explosive Charge Volume of Hard Ductility Rocks in the Roadway Excavation at Jinshan Gold Mine
金山金矿硬韧性岩巷道掘进炮眼布设和装药量的改进
"Shells have no eyes.
“枪炮是没有眼睛的。
solidly packed tunnel
充填密实的炮眼孔道
permeability of tunnel fill material
炮眼充填材料的渗透率
partially sand packed perforation
地层砂部分充填的炮眼
shotgun marriage [ wedding ]
【采矿】不平衡爆破的炮眼
All gun-ports were open and the muzzles peeped wickedly from them.
所有的炮眼都开着，炮口不怀好意地从炮眼里向外窥探。
When a normal bench round is fired the general result is for the centre of gravity of the round to be moved forward.
起爆普通梯段炮眼组时，一般的结果是炮眼组的重心前移。
Five men in a twin-forty mount had been hit.
双管四十毫米火炮装置上的五名炮手被打中了。
A flared opening for a gun in a wall or parapet.
枪眼，炮眼在墙或护墙上开的用于射击的洞口
The window was an embrasure in an enormously thick wall.
窗户是个炮眼，墙壁异乎寻常的厚。
We must strike while the iron's hot and get to work this very evening. You, Chu-chai, can put it round among your banker friends that you're going to demand additional collaterals for all loans made on government bonds as the only security.
我们连夜布置，竹斋，你在钱业方面放一个空炮：公债抵押的户头你要一律追加抵押品。
Our min wait until the gunner lit their matches in the cannon - port
我们的人等到火炮瞄准手在炮眼点燃了火柴才行动
Our men waited until the gunners lit their matches in the cannon-ports.
我们的人一直等到炮手在炮眼点燃了火柴才行动。
Our men wait until the gunner lit their matches in the cannon-port.
我们的人等到火炮瞄准手在炮眼点燃了火柴才行动。