Currently, a large number of noise suppression approaches are proposed.
目前，图像抑噪的方法有很多种。
Application of firetrace automatic fire suppression systems as one kind of new-style fire extinguishing equipment is extremely limited in number in our country at present.
火探管式自动探火灭火系统，作为一种新型的探火灭火设备，目前在我国的推广应用还非常有限。
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