It is also known why high-speed roller chain has better perfo rmance.It gives some information to raise performance of roller chain made in ch ina.是什么意思_It is also known why high-speed roller chain has better perfo rmance.It gives some information to raise performance of roller chain made in ch ina.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句