Based on the theory of double-telescopic prop of equal load equal setting and equal pressure,the process of the optimal design was built after the introduction of principle and the analysis of the initial conditions.

The content of the subject is to develop a kind of equal setting equal pressuredouble-telescopic prop used in power support.

Effective control on isobaric spray & blowtorch and airflow spray distance of pulsed bag-hose precipitator means a key technology in ensuring the result of dust removal and the effective measures for electricity saving and energy conservation,prolonging the use of filter bag.

15 K for the Li2B4O7-LiCl-H2O system by isopiestic method,and the vapor pressures and the osmotic coefficient have been calculated from the measurements.

The isopiestic molalities and the water activities have been measured by isopiestic method and the water vapor pressures and the osmotic coefficients have been calculated from the measurements in the ion-strength range from 0 0581 mol·kg -1 to 0 6320 mol·kg -1 at T=298 15 K for the system Li-Mg-Cl-borate-H 2O.

The water activities and osmotic coefficients have been determined at 25 ℃, over the range of concentrations from diluted up to saturated with respect to the solute of NaCl for the synthetic salt lake brine Li Na K Mg Cl SO 4 H 2O systems by isopiestic method using an improved apparatus.

Replacing cuprammonia purification with full autothermic non-constant pressure methanolizing-methanation process;