Comparing siphon drainage system with gravity drainage system, the paper considers the siphon drainage system to possess many advantages such as small pipe dia, little installing space, non-sloped suspended pipe, short sewage connecting and underground pipe length etc.

Compared with gravity drainage system, it has the advantages of small pipe diameter and installing space, non-sloped suspended pipe, less sewage connecting and underground pipes and etc.

The research and application of the metal mold vacuum gravity exactitude foundry method on aluminum alloy;

Aluminum Droplet Combustion in Normal and Low-gravity Environment;

Numerical Simulation of Gravity Synsedimentary Fault;

Study on Weight and Amount of Block on Hosepipe of Submarine Stocking and Supplying System;

Optimum Design of Honeycomb Paperboard Based on Stiffness-strength-weight;

Analysis on grasping stability with weight and its application;

In this case,with selection and non-selection experiments,we studied and evaluated the effect of light,physical features of leaves and gravitation as cues on the whitefly s orientation behavior to locate underside of host leaves.

In the special theory of relativity,the simple expression of gravitation in the small region around earth is derived by considering the infinitude of plane with uniform density but actual earth.

The authors also analysed the gravitation influence on the oscillation period of the inertial scale when it is placed in different divtections.