日立ZAX450-ZX360-ZX470挖掘机回转支承/大齿圈/大转盘日立ZAX230-EX220-ZX870挖掘机回转支承/大齿圈/大转盘日立挖掘机回转支承ZX110-ZX120-ZX135-ZAX140-ZX160-ZX170-ZX180日立挖掘机回转支承ZX190-ZX850-ZX550-ZX700-ZX600-ZX670-ZX870沃尔沃EC60-EC55-EC210B挖掘机回转支承/大齿圈/大转盘)