HEL-L：轻型直升机

“轻型直升机”（Light Helicopter）在军事及相关机构的日常使用中，常被缩写为“HEL-L”，以提升书面与口头交流的效率。这一简称因其简洁明了的特点，广泛应用于各类报告、计划和指令中，服务于快速信息传达的实际需求。

If necessary, the ship could be configured into a hospital ship, a light helicopter carrier, or a transport ship.
如果必需，船能被配置成一艘医院船，一艘轻直升飞机母舰或一艘运输船。
Y-2 is the first light helicopter of China's own designs, with initial success in flight test.
Y&2是我国第一架自行设计并初步试飞成功的小型直升机。
The existing model of aerodynamic interaction between helicopter fuselage and rotor is developed in the light of helicopter aerodynamics theory. It is still not satisfactory and it requires a great deal of calculation.
依据直升机空气动力学理论建立起来的旋翼/机身气动干扰模型，至今尚不能达到满意的准确度，而且它的计算工作量相当大。
Dangerous region calculations for a light coaxial helicopter
轻型共轴式直升机回避区近似计算
The dangerous region of a light weight coaxial helicopter has been calculated by this method and we have got a fairly satisfactory result.
使用此方法对某轻型共轴式直升机的回避区进行了计算，得到了较好的结果。

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