笛(di)卡兒坐標(biao)系(xi)(xi)分為左手(shou)(shou)系(xi)(xi)和右(you)(you)手(shou)(shou)系(xi)(xi)。配管設計柔性分析采(cai)用右(you)(you)手(shou)(shou)系(xi)(xi)，右(you)(you)手(shou)(shou)坐標(biao)系(xi)(xi)這(zhe)名(ming)詞是由右(you)(you)手(shou)(shou)定(ding)則而來的(de)(de)。先將右(you)(you)手(shou)(shou)的(de)(de)手(shou)(shou)掌(zhang)與(yu)手(shou)(shou)指(zhi)伸(shen)直(zhi)(zhi)，然后，將中指(zhi)豎起與(yu)食指(zhi)呈直(zhi)(zhi)角關系(xi)(xi)，再將大拇指(zhi)往上指(zhi)去(qu)，與(yu)中指(zhi)、食指(zhi)都(dou)呈直(zhi)(zhi)角關系(xi)(xi)，則大拇指(zhi)、食指(zhi)、與(yu)中指(zhi)分別表示了(le)右(you)(you)手(shou)(shou)坐標(biao)系(xi)(xi)的(de)(de)X軸，Y軸，與(yu)Z軸，如圖(tu)17.3所示。同樣，用左手(shou)(shou)也(ye)可以表示出左手(shou)(shou)系(xi)(xi)。