'it's as well to be on the safe side,' said the Rat reflectively, polishing a pistol-barrel on his sleeve and looking along it.
“保险点总没坏处吧，”河鼠沉吟着说，他把一支枪筒在袖子上擦得锃亮，顺着枪管察看。
2
Long roll-tab sleeve with barrel cuff can be rolled up to the elbow and secured with a button.
长卷筒标签与桶袖的袖子可以卷起到肘部和一个按钮担保。
3
Sliding steel sleeve at the lower end of rubber barrel is used to make reasonable force arrangement for downhole packer meanwhile the expandable pressure of rubber barrel is decreased.