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CH-4 is capable of firing air-to-ground missiles from an altitude of 5,000 meters (~16,400 feet), meaning the aircraft is capable of staying outside the effective range of most anti-aircraft guns. It also allows the CH-4 to be able to fire from a position that provides a wider area of view.

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彩虹-4无人机（英文：CH-4 unmanned aerial vehicle，缩写：CH-4 UAV），是在彩虹-3无人机基础上研发的一种中程察打/侦察探测（民用版）一体无人机。 彩虹-4无人机于2010年开始研制，2011年9月完成首飞，2012年11月，在第九届中国国际航空航天博览会上，彩虹-4无人机系统 ...

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The CH-series unmanned aircraft have been sold to armed forces in more than 10 countries in the Middle East, Southeast Asia and Africa, making them the largest military drone family China has ...

[2] 彩虹四號無人機是在彩虹三號的基礎上，新研發的一種無人駕駛飛行器，其官方發佈了ch-4a及ch-4b兩款型號。彩虹四號無人機系統的主要裝備構成包括：中程無人機、地面車載遙測遙控站和地面保障設備。

Methane (US: / ˈ m ɛ θ eɪ n / METH-ayn, UK: / ˈ m iː θ eɪ n / MEE-thayn) is a chemical compound with the chemical formula CH 4 (one carbon atom bonded to four hydrogen atoms). It is a group-14 hydride, the simplest alkane, and the main constituent of natural gas.

2019年7月3日 · cf-4、ch-4、ci-4、cj-4是柴油机油的质量等级，如ch-4的意思就是指质量级别是ch级，4就是四冲程发动机的意思。 目前我们常见的是CF-4和CH-4。 常见的几个级别由高到低的排序是：

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