笛卡兒坐標(biao)系(xi)分為左手(shou)(shou)(shou)(shou)系(xi)和(he)右(you)手(shou)(shou)(shou)(shou)系(xi)。配管設計柔性分析采用右(you)手(shou)(shou)(shou)(shou)系(xi)，右(you)手(shou)(shou)(shou)(shou)坐標(biao)系(xi)這(zhe)名(ming)詞是由右(you)手(shou)(shou)(shou)(shou)定則而來的。先將右(you)手(shou)(shou)(shou)(shou)的手(shou)(shou)(shou)(shou)掌與(yu)手(shou)(shou)(shou)(shou)指(zhi)(zhi)伸直(zhi)，然后，將中指(zhi)(zhi)豎起與(yu)食指(zhi)(zhi)呈(cheng)直(zhi)角關(guan)(guan)系(xi)，再(zai)將大拇指(zhi)(zhi)往上指(zhi)(zhi)去，與(yu)中指(zhi)(zhi)、食指(zhi)(zhi)都呈(cheng)直(zhi)角關(guan)(guan)系(xi)，則大拇指(zhi)(zhi)、食指(zhi)(zhi)、與(yu)中指(zhi)(zhi)分別(bie)表(biao)(biao)示了右(you)手(shou)(shou)(shou)(shou)坐標(biao)系(xi)的X軸，Y軸，與(yu)Z軸，如(ru)圖17.3所示。同樣，用左手(shou)(shou)(shou)(shou)也可以(yi)表(biao)(biao)示出左手(shou)(shou)(shou)(shou)系(xi)。