bear gun

This paper analyses the working principles and main features of cleavage gun,describes the mechanical properties of rock materials under static load and the principle of cracking control,sets up a mechanical model for calculating the cracking of rock materials under the effect of cleavage gun,gives out main design parameters of cleavage gun cracking system and their application in mining.

文章分析了劈裂枪切割石材的基本原理及其主要特点，论述了石材在静载作用下的力学特性和断裂控制的基本原理，建立了石材在尖劈作用下的断裂力学模型，给出了劈裂枪切割石材系统的主要设计参数及其在矿山的应用。

Versatile block, pressure gun and blind flange are suggested for different heat exchangers.

针对不同的换热器给出了应用范围广泛的堵头、试压枪及盲

Ocular trauma by spray gun in 45 cases;

压力喷枪致眼外伤45例