Design code and key technical points for main tunnel and parallel heading of East Qinling Super-long Tunnel are introduced.
介绍东秦岭特长隧道工程正洞及平行导坑的设计标准、施工技术要点。
In a cat's throat, for example, the two tubes run roughly horizontal and parallel to each other before heading on to the stomach and lung, respectively.
举个例子，猫的喉咙里这两种管子大致是平行分布，然后各自到达胃和肺部。
Starting from an altitude of no less than twenty (20) meters and on a heading parallel to the flight line, with the helicopter inverted and to the pilot right, start your Autorotation.
机头保持与航道平行，且高度不得低于20公尺，直升机保持倒飞姿态，向操控者的右侧开始执行熄火降落。
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