笛卡(ka)兒坐標系(xi)(xi)(xi)分為左(zuo)(zuo)手(shou)系(xi)(xi)(xi)和右(you)手(shou)系(xi)(xi)(xi)。配管設計柔性(xing)分析采用右(you)手(shou)系(xi)(xi)(xi)，右(you)手(shou)坐標系(xi)(xi)(xi)這名詞是由右(you)手(shou)定則而來的(de)(de)。先將右(you)手(shou)的(de)(de)手(shou)掌與(yu)手(shou)指(zhi)(zhi)伸直，然后，將中指(zhi)(zhi)豎起與(yu)食(shi)指(zhi)(zhi)呈直角關(guan)(guan)系(xi)(xi)(xi)，再將大(da)拇(mu)指(zhi)(zhi)往上指(zhi)(zhi)去，與(yu)中指(zhi)(zhi)、食(shi)指(zhi)(zhi)都呈直角關(guan)(guan)系(xi)(xi)(xi)，則大(da)拇(mu)指(zhi)(zhi)、食(shi)指(zhi)(zhi)、與(yu)中指(zhi)(zhi)分別表(biao)示(shi)了右(you)手(shou)坐標系(xi)(xi)(xi)的(de)(de)X軸，Y軸，與(yu)Z軸，如(ru)圖(tu)17.3所(suo)示(shi)。同樣，用左(zuo)(zuo)手(shou)也(ye)可以表(biao)示(shi)出(chu)左(zuo)(zuo)手(shou)系(xi)(xi)(xi)。