Bug squash Tummy - Here the bug pats his stomach and it squashes and stretches.

According to the tensile deformation and the impact with the seabed of cable for the platform in the deep water, the lumped mass method was adopted to set up the cable equation.

The main factor causing destruction of roadway in tectonic stress field is found to be the high tensile strain, which appears after the coal seam above haulage roadway is mined.