A.聽(tīng)不到;聽(tīng)到 B.聽(tīng)到;聽(tīng)不到 C.聽(tīng)到;聽(tīng)到 D.聽(tīng)不到;聽(tīng)不到
A.供油拉桿卡死 B.柱塞彈簧卡死 C.高壓油管破損 D.出油閥座的墊片損壞