梯板
1.KANTROVICH SOEUTION FOR THE PROBLEM OF BENDING OF SKEW ANGULAR PLATTE AND PLATE OF ISOSCELES TRAPEZOID
2.an ancient stringed instrument similar to the lyre or zither but having a trapezoidal sounding board under the strings.
3.2~# rock nitramon and petnaerythritoltetranitrate or trinitrotoluene explosive is used to weld aluminum upset plate and mild steel base plate, the equation upset plate and explosive thickness can be deduced from Richter equation. It is effectual for being used in practice by example of analysis.
