层缸 double shell cylinder: 双层缸cylinder shell: 汽缸壳体; 圆筒状壳体double shell: 双层薄壳; 双层外壳; 双属外壳double cylinder: 双瓶式; 双汽缸的double-cylinder: 双层筒; 双缸下载手机词典可随时随地查词查翻译