A new apparatus for wet coal classification were designed,some experiments have been done to explore the efficiency on pneumatic classification of the wet coal's moisture,In the condition of 6%,the classification effi- ciency achieved 82.

Adhesive mechanism of moist fine coal on screen plate;

The encapsulating polymers used in electronic packaging are characteristic of high porosity,which makes the material susceptible to tile moisture absorption.

Therefore, it will meet the demands of avoiding the frozen injuries to pavement caused from the appearance of moisture and over-moisture in junior geologic zone, and will guarantee the strength and stability of the pavement.

In order to know the resistance of phage to external environment,suspension and carrier quantitative test methods were used to observe the resistance of F_2 phage,T_4 phage and T_7 phage in dry environment and wet environment and to compare parallelly with poliovirus.

The electrical conductivity and electro-thermal temperature rise of carbon fiber reinforced cement mortar under dry and wet conditions were studied separately.

In low temperature and humidity of actual circumstance, we do some research about using dissimilar resin.

Because the humidity is a big problem in the underground space, this paper aims to solve the humidity problem in underground space through investigating and measuring the ventilation of underground space.

The high ambient temperature and damp weather has harmful influence on the cupola melt-ing that causes increase of blow hole defect.