The needle handle or needle end of the needle is provided with an air filtering apparatus and a back flowing preventing apparatus.
该针的针柄或针尾设有空气过滤装置和防反流装置。
The nylon nets were attached to the filtering apparatus on original return-wind exit on the lateral wall of surgical operating room.
方法对回风口滤过装置贴附上尼龙网前后手术室的风速、细菌浓度和尘埃粒子量测定。
The utility model relates to a filtering apparatus, in particular to the filtering apparatus used for a variable air valve timing device.
本实用新型涉及一种过滤装置，尤其是指一种使用在可变气门正时装置上 的过滤装置。
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