The tiny joystick has been replaced by cellphone-like four-way control buttons, and the page-turn Forward and Back buttons, which flank both edges, are silent now, for the benefit of sleeping spouses.

Some methods are put forward to evaluate ultimate flank friction and ultimate tip resistance of piles according to the geotechnical engineering condition in Guangzhou.

To improve the efficiency and quality for numerical control of machining of integral impellers, a new method, i. e. flank milling on divided pieces, was put forward.