This paper simply analysed basic conditions and velocity range in various weights of helicopter formation flight in single engine operative and performance prediction in specific weight.
本文对直升机单发编队飞行执行某任务的基本条件，不同重量时单发飞行的飞行速度范围，特定重量的性能估算进行了简单的分析。
Two-stroke engine has its intrinsic advantages in terms of high specific power, compactness, light weight, low cost, etc.
二冲程汽油机具有升功率大、机械损失小、结构简单、制造成本低以及便于维修等特点。
Work, teaching that calculator that management engine room, maintenance the whole school is on the contrary its usual most is in its work the specific weight for sharing of is very low.
管理机房、维护全校的计算机反而成了其日常最主要的工作，教学在其工作中所占的比重相当低。
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