If you walk clockwise, you will see that the surface is to your left or use the right-handrule.
如果沿顺时针方向走,就会发现这个曲面在左方,或者用右手定则来判断。
2
Some problems about the offset of contour lines which consist of sequential lines and direction complies with lefthandrule are studied.
对连续线段组成的、方向符合左手定则的平面轮廓线的偏置问题进行了研究。
3
In the musical performance rule of ErHu, how to use bow and finger of lefthand is analyzed, that is based on the moment balance principle and bowstring principle.