arc trace
6.The meshing processions of circular-arc-tooth-trace (CATT) cylinder gear were divided into three stages.
7.Circular-arc-tooth-trace (CATT) cylinder gear differs from straight-cut cylinder gear in calculation of the gear tooth bending stress.
8.The working condition of circular-arc-tooth-trace (CATT) cylinder gear has certain effect on the contact zone between its tooth flanks.
9.According to the special tooth structure of the Circular-Arc-Tooth-Trace cylindrical gear (CATT gear), an analysing model of its bending strength is established.
10.The mafic dykes are characterized by arc-like trace elements, high initial 87Sr/86Sr ratios and low eNd(t) values, and show somefamiliarities with the EMII-mantle source.

