This article mainly discusses how to use the thyristor adjustable speed system to control the cutting parameter in the process of enlarging & reaming D25mm hole in the wall panel of the 1515 spinning machine.

The stability performance of the vertical prop under wall panel action and the bearing capacity under negative pressure of the speaker are analyzed.

In this paper, the author focuses on these properties according to some experiments and researches, which include the carrying capacity of twenty-four wall panels of haydite concrete, the elastic modulus of haydite concrete and the relationship of .

The steel wire web and foam concrete light wall board is a kind of foamed concrete wall board strengthened by double layers of steel wire web with density of 596 kg/m3.

Concerning the designing procedures and examination standards, the construction of CL wallboard may be one-sided prefabricated and one-sided cast.

The problems appeared in design of mounting of wall plates on 25T Type passenger cars are put forward,the method to solve the problems is given,the mounting way and material of the wall plates are expounded briefly.