常見例句雙語(yǔ)例句Based on the screw theory, the first-order effect coefficient matrixes of a 3-UPU parallel pyramid mechanism under initial position and movement along X-coordinate axis are established.采用螺旋理論，首先分別建立了3-UPU 并聯(lián)角臺(tái)機(jī)構(gòu)在初始位形下和沿X 軸方向發(fā)生移動(dòng)后的一階影響系數(shù)矩陣。 返回 pyramid of the first order