A.正方折疊B.長(zhǎng)方折疊C.長(zhǎng)方翻角折疊D.鋸齒折疊
A.16~24B.18~22C.16~2D.18~20
A.抖鋪式B.推拉式C.撒網(wǎng)式D.料動(dòng)式