中英文对照 Roller chains are probably the most common and are used in a wide variety of low-speed to high-speed drives Engineering steel chains are used in many low-speed, high-load drives. Silent chains are mostly used in high-speed drives.中英文对照 „ Roller chains are probably the most common and are used in a wide variety of low-speed to high-speed drives. „ Engineering steel chains are used in many low-speed, high-load drives. „ Silent chains are mostly used in high-speed drives