A.按動(dòng)I端風(fēng)笛按鈕時(shí),I端風(fēng)笛響
B.按動(dòng)I端風(fēng)笛按鈕時(shí),II端風(fēng)笛響
C.按動(dòng)II端風(fēng)笛按鈕時(shí),I端風(fēng)笛響
D.按動(dòng)II端風(fēng)笛按鈕時(shí),II端風(fēng)笛響
A.一輪應(yīng)撒砂
B.三輪應(yīng)撒砂
C.四輪應(yīng)撒砂
D.六輪應(yīng)撒砂
A.一輪應(yīng)撒砂
B.三輪應(yīng)撒砂
C.四輪應(yīng)撒砂
D.六輪應(yīng)撒砂