Surface mounted closers shall be full rack and pinion type, with pressure cast alloy shell, with no more than 53 mm (2 1/8") projection from the door surface."
On staggered grids, the approximate projection procedure for incremental projection methods is not sufficient to avoid the oscillation of pressure.
对于压力增量形式的投影方法，在非交错网格上，仅仅采用近似投影过程，通常不足以抑制压力场的数值振荡。
3
Besides we also have various inspection apparatus such as projection machines pull and pressure testers hardness testers and inside and outside diameter testers.