短語詞組短語combination E bearing 組合軸承multi combination oil bearing formation 多組合油層combination bearing reducer 組合軸承座式減速器The Bi -directional Combination Bearing 雙向組合軸承Bearing combination 軸承組合petroleum -bearing combination 含油氣組合combination of oil -bearing area 中部含油組合 返回 combination bearing