短語詞組短語petroleum -bearing combination 含油氣組合combination bearing [機(jī)]組合軸承;珠輥軸承;組合;組合軸承combination bearing reducer 組合軸承座式減速器combination E bearing 組合軸承The Bi -directional Combination Bearing 雙向組合軸承multi combination oil bearing formation 多組合油層 返回 bearing combination