短语词组短语axle shaft oil seal 半轴油封Rotary Shaft Lip Seal 旋转轴承唇形密封圈drive shaft grease seal 主动轴润滑脂密封Shaft oil seal 前油封shaft -seal diaphragm 轴封膜片shaft end seal 轴封front shaft oil seal 前轮油封 返回 shaft seal