center heading 中文意思是什麼
center heading
解釋
隧道的中央導洞-
While maintaining constant altitude, speed and heading begin a circle to either the right or the left with the tail of the helicopter pointing to the center of the circle
保持機尾朝向圓心，且以等高度、等速度的方式，執行水平圓。 -
Leaving in the morning heading north, via harrisburg, visit hershey ' s chocolate factory, and corning glass center
早餐后，經賓州首府哈里斯堡，著名赫氏朱古力廠。 -
On the basis of model test, a better construction method under pre - prop for the surrounding rock i, ii, iii, named whole section excavation with heading in moderate degree and that with center heading and center partition first, then with two sides heading, is put forward
在模型試驗的基礎上，提出了、 、類圍巖隧道在預支護下的優化施工方法，即下導洞適度超前全斷面開挖與先行中導洞及中隔墻、其次兩側下導洞適度超前全斷面開挖。
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