笛卡兒坐(zuo)標(biao)(biao)系(xi)分(fen)為左(zuo)手(shou)(shou)(shou)(shou)(shou)系(xi)和右手(shou)(shou)(shou)(shou)(shou)系(xi)。配管設(she)計(ji)柔性分(fen)析采用(yong)右手(shou)(shou)(shou)(shou)(shou)系(xi)，右手(shou)(shou)(shou)(shou)(shou)坐(zuo)標(biao)(biao)系(xi)這名詞是(shi)由右手(shou)(shou)(shou)(shou)(shou)定(ding)則而(er)來(lai)的。先將右手(shou)(shou)(shou)(shou)(shou)的手(shou)(shou)(shou)(shou)(shou)掌與(yu)手(shou)(shou)(shou)(shou)(shou)指(zhi)伸(shen)直，然后，將中指(zhi)豎起與(yu)食指(zhi)呈直角關(guan)(guan)系(xi)，再將大(da)(da)拇(mu)指(zhi)往(wang)上(shang)指(zhi)去(qu)，與(yu)中指(zhi)、食指(zhi)都呈直角關(guan)(guan)系(xi)，則大(da)(da)拇(mu)指(zhi)、食指(zhi)、與(yu)中指(zhi)分(fen)別(bie)表示(shi)(shi)了(le)右手(shou)(shou)(shou)(shou)(shou)坐(zuo)標(biao)(biao)系(xi)的X軸(zhou)，Y軸(zhou)，與(yu)Z軸(zhou)，如圖17.3所示(shi)(shi)。同樣，用(yong)左(zuo)手(shou)(shou)(shou)(shou)(shou)也可以表示(shi)(shi)出左(zuo)手(shou)(shou)(shou)(shou)(shou)系(xi)。