无论多深的渠、潭、井，只要光线好，游鱼、碎石，丝纹可见。
No matter how deep the drainage, Tan, well, as long as the light is good, fish, gravel, silk pattern visible.
使用时，将钻头放入钻孔的位置，左旋转即可钻出左旋丝纹的钻孔。
When used, the drill bit is put into a drill hole, and then rotated left to drill out the drill hole with left-hand threads.
探春交给了李纹，李纹急忙把竿垂下，觉得丝儿一动，忙挑起一看是个空钩。
She handed the pole to Li Wen, who lowered the line, and raised it when she felt a jerk, only to see an empty hook.
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