常見(jiàn)例句Involving a perpendicular or rightangle relationship. 指垂直或直角關(guān)系。Wall type:the exterior of fan has two terminals ,one side is bell-mouthed type, the other side is 90 degree rightangle flange type. 壁式：風(fēng)扇外形兩耑一邊是喇叭口型，一邊是90.;直角法蘭型；Some Netizen said that, the train hard place designs nobody nature tomanifest in two points: One is the seat back cushion has the rightangle; 有網(wǎng)友說(shuō)，火車(chē)硬座設(shè)計(jì)無(wú)人性化躰現(xiàn)在兩點(diǎn)：一是靠背成直角； 返回 rightangle