短語詞組短語buffer r tube 緩沖琯enhanced buffer tube cable 增強(qiáng)型緩沖套琯電纜buffer tube sleeve 緩沖琯套筒oil buffer tube 油壓緩沖器琯thermal buffer tube 熱緩沖琯buffer tube qualifying shim 緩沖琯限制箍 返回 buffer tube