Warning: file_put_contents(): Only 0 of 7250 bytes written, possibly out of free disk space in /home/www/wwwroot/ndsq.cn/index.php on line 55 roller chain英英字典_roller chain剑桥英语解释_roller chain柯林斯英文解释_开心英文字典_柠咚词
1. N a chain for transmitting power in which each link consists of two free-moving rollers held in position by pins connected to sideplates 滚子链[engineering]