A.直角B.彎角C.斜角D.轉(zhuǎn)角
A.設(shè)計(jì)寬度B.設(shè)計(jì)標(biāo)高C.設(shè)計(jì)尺寸D.設(shè)計(jì)要求
A.防水劑B.防凍劑C.防火劑D.防爆劑