| 9. | We specialized in manufacturing main kinds of undercarriage parts for excavator , bulldozer , such as track rollers , top rollers , idlers assy , sprockets , chain for komatsu , cat , hitachi , kato etc 我们专门制造各种主起落架零件,挖掘机,推土机,等径辊,胶辊,闲散总成,链轮,链小松,卡特彼勒,日立,加藤等 |