具体操作方法是：用一条沾了墨的线，两个人每人拿一端然后弹在地上或者墙上。作用是用来确定水平线或者垂直线，又或者作为砌墙的参考线；另外在工地里面找水平位置的时候也会用到它。
投弹线 bomb release ling ; [军] bomb-release line
射弹线 [军] projectile line
弹力纱线 Elastane Yarns ; Lycra yarn
圆线弹簧 wire Tight pring
最后投弹线 final bomb release line
弹道曲线 [力] ballistic curve ; ballistic trajectory ; ballistical curve
射线弹球 X-Ray Ball
线弹性断裂力学 linear elastic fracture mechanics ; LEFM ; linear elastic fracture ; linear elastic fracture mechanics,
最初投弹线 initial bomb release line
给出了一种线接触弹流问题中油膜厚度的理论计算公式。
A theoretical formula for computing the film thickness in line contact EHL problems is derived.
弹拉双线并松线，使风筝翻转。
Pop with both hands then give some slack for the pitch rotation.
提出了等温线接触弹流问题的完全数值解，通过逆解迭代计算方法，获得了不同工况条件下的油膜压力分布、油膜厚度和油膜形状。
A numerical solution for the elastohydrodynamic line contacts problem under heavy loads is presented, and the corresponding method which makes use of the inverse iteration is also described.
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