Two fashions of rough machining based on solid models are researched: profile rough machining, iso-height plane rough machining.

研究了基于实体模型的粗加工的两种方式：外形粗加工和等高面粗加工。

youdao

Crew members would study the effects of height and temperature on themselves and the plane.

VOA: special.2010.05.26

The plane reached a height of eight kilometers.

VOA: special.2010.07.07

The software in the four-seater Piper Warrior light plane will allow Mr Cunningham to receive constant updates on the plane's height, position and speed at the touch of a button.

BBC: NEWS | UK | England | Oxfordshire | Blind pilot on target for record

Or seeing the plane's height above the river?

CNN: Who's really flying the plane?

During the daytime, the batteries accumulate energy while the plane climbs to a height of up to 30, 000 feet.

WSJ: A Solar-Powered Plane Travels Light | WSJ. Magazine May 2013