2) progressive spiral cutting
渐进式螺旋掏槽
1.
However, the progressive spiral cutting has merits of few drilling, smaller charging and better blasting effectiveness.
渐进式螺旋掏槽具有钻孔少、装药少、爆破效果好的优点,在分析渐进式螺旋掏槽原理基础上介绍了其在水布垭地下厂房中的应用实践。
3) involute helicoid
渐开螺旋面
1.
Theoretical verification of generating method for grinding of gear involute helicoid;
展成法磨削齿轮渐开螺旋面的理论验证
2.
According to the working principle of conical wheel gear grinding machine and meshing theory of gears,the involute helicoid grinding with conical wheel gear grinding machine is proved with normal of tooth profile method,which include equations of tooth profile and involute helicoid.
文章根据锥面砂轮磨齿机工作原理和齿轮啮合原理,利用齿形法线法,从齿形方程和渐开螺旋面两个方面对锥面砂轮磨齿机正确磨削斜齿圆柱齿轮渐开螺旋面进行了理论验证,该验证方法及推导过程有助于理解采用齿条形刀具磨削齿轮的原理,同时对提高磨齿加工精度具有理论指导意义。
4) progressive spiral tube
渐近螺旋管
1.
The paper demonstrates, from the point of view of mathematic and mechanics, that, in boilers, progressive spiral tubes are superior to current coil tubes with respect to space occupied, stress intensity and flow resistance.
该文运用数学和力学方法分析证明了渐近螺旋管无论从占地、受力、阻力、传热诸方面要优于现行的锅炉蛇形管。
6) precession of gyroscope
陀螺旋进
补充资料：渐进式防撞能区
渐进式防撞能区能在发生撞击事故的过程中车身前后部会逐级溃缩，从而吸收掉可能传递到乘客舱的能量。这样乘客舱被显著加固，成为一个有效的生存舱，可以保护乘客免受伤害。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条