These notes are raindrops on the surface of the water hit the ring.
这些音符是雨点在水面上击出的圈。
First, the water pump mechanical seal ring on the surface of metal corrosion.
第一，水泵的机械密封上金属环表面均匀腐蚀。
Circle surface of metal brake ring operated by quenching.
钢制动轮外圆表面经淬火处理。
Lamp shell surface cover ring for standard size, suitable for all kinds of lamps installation;
灯壳面盖环为标准尺寸，适合各种灯具的安装装配；
Lamp shell surface cover ring for standard size, suitable for all kinds of lamps installation;
灯壳面盖环为标准尺寸，适合各种灯具的安装装配；
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