Acoustics - determination of sound power radiated into a duct by fans and other air - moving devices - in - duct method iso 5136 : 2003 ; german version en iso 5136 : 2003 声学.风机和其他风动设备辐射入管道中的声功率的测定
The sculpture named " a tender wind " , uses power of the wind to drive the motion of the wings and body of the dragonfly , expressing the elegant symbiosis of nature and life itself 以迎风为名的雕塑，还用风动的活动翅膀和蜻蜓身体，生活地表现自然与生命的优美神采。
The sculpture named " a tender wind " , uses power of the wind to drive the motion of the wings and body of the dragonfly , expressing the elegant symbiosis of nature and life itself 以迎风为名的雕塑，还用风动的活动翅膀和蜻蜓身体，生活地表现自然与生命的优美神采。
M - type pneumatic riveting hammer is mainly used for hot working of metal construction in bridge truss , mine car , and it is also used for other working place in which impact energy is to be required 型系列风动铆钉机主要用于金属结构的热铆接工作，如桥梁、衍架、矿车等铆接工作，也可用于其它需要冲击能量的工作场合。
The paper employs the method of three stage design to make analysis on the pneumatic turbine system of the mine pneumatic pump in theory and put it into experiment on the base of the kfb30 - 18 mine pneumatic pump 本课题采用三次设计方法，以kfb30 - 18型矿用风动水泵为基础，对该产品的风动涡轮系统进行了理论分析和实验研究。
The authors studied the structural design and the working principle of two new types of water - saving percussion tools , water - saving hydro percussive tools and pneumatic steel ball percussion tools 从分析干旱缺水地区节水型冲击器的设计思路出发，对两种新型节水冲击器风动钢球冲击器和液动冲击器的结构设计、工作原理进行了研究。
At the same time , according to the original parameter of pneumatic pump , the efficiency and flux of the pump have been theoretically amalyseed and calculated , and after that the waterpower of the water wheel has been designed 同时，根据风动水泵的原始参数，对水泵的效率、扬程和流量进行了理论分析计算，并进行了水轮的水力设计。
The painting " retreat " not only gives one a unique perspective on a gorgeous , mysterious , serene and special mountain forest , but also allows the observer to almost hear the sound of branches and leaves happily vibrating in the fresh mountain breeze . . 的枝叶风动声闭关一画不但予人有艳玄清奇的山林的观感享受，更让欣赏者听到清风中枝叶欣然的振动声
Taking into consideration the weak points of mufflers of the present rock drills and by analyzing the working characteristic and the noise mechanism , the author has put forward the method to control and reduce the noise , and trial - produced more effective and practical device of mufflers 摘要针对现有风动凿岩机消声器的缺点，从凿岩机的工作特性和噪声机理分析入手，提出降低噪声的控制方法，并研制高效实用的排气消声装置。
Our company is located in furong town , famous for drills manufacturing , to the north is yandang mountain - one of the greatest sceneries in china , convenient traffic , near to no . 104 highway . we specialized in manufacturing cemented carbide series , hex fey wrennch magwetil nut serrer power pneumatic screwdriver bits series , screwdrivers , pneumatic holder , diamond core drills for glass , diamond core drills for marble and silica carbide materials , etc 本公司位于国家级风景区(世界地质公园之称)雁荡山南麓，被命名为“中华全国钻头(建工)产业基地”的芙蓉镇，交通便捷，近临104国道线，是以专业生产硬质合金系列电动、风动螺丝批咀、内六角板手、螺丝刀、套筒、玻璃开孔器、大理石开孔器、金刚砂等系列产品的厂家。
