There is a hole in the shaft through which the air from the upper chamber enters the lower one . 腔筒中心有一孔道，压缩空气就是由此从上气室进入下气室的。
Then there were the hammering explosions past his ears and the gun barrel hot against his shoulder . 他这时耳边响起了哒哒哒的枪声，枪筒灼热地抵在他的肩上。
Fall velocities are usually measured by observing individual grains settling in a column of still fluid . 沉速通常是由观测单个颗粒在圆柱筒内静止的液体中沉降来测定的。
Impulsive loads for structural tests have been generated by explosive cartridges or by small rockets . 人们曾用过弹药筒的爆炸或用小型火箭来产生结构试验所需的脉冲荷载。
With the help of no more than binoculars it is easy to distinguish the two main kinds of lunar landscape . 用不着使用双筒望远镜，就可以容易地分辨出月球上的两种主要景象。
In the initial stages of the development of samplers, an open container or bucket was used to dip samples from a stream . 最初的取样器是开口的容器或筒，直接从河中提取水样。
He took the flashlight from the man, reached down into the engine and plugged the stray lead back onto the cylinder head . 他从那个手里拿过电筒照着发动机，把断路的导线接到汽车缸盖上。
Even a careless momentary look through the eyepiece of field glasses or the telescope can do great harm to the eyes . 通过望远镜或双筒望远镜的目镜，即使对太阳只是漫不经心的一瞥，也会对眼睛造成严重的伤害。
Experimental research on tube - shaped mask under wind loads 筒型桅杆风载实验研究
Dynamic balancing of rolls and dryers of paper machine 造纸机械辊筒与烘缸动平衡
