... 可变面积流量计 area flow meter 可变面积法 area methods 可变面积式流量计 variable area type flow meter ...
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velocity-area methods 速度面积法 ; 速度
variable-area methods 可变面积法
variable area methods 可变面积法
Velocity-area methods using current-meters 使用测流计的速度面积法
area computation methods 面积测算方法
Area Based Methods 区域的算法
area-measuring methods 面积量算方法
Changes in farming methods have badly affected employment in the area.
耕作方法的改变严重影响了这个地区的就业。
They say the area will become depended on imported food unless water is saved through methods like Low Till Farming.
他们说,除非通过低耕农业等方法节约用水,否则该地区将变得依赖进口食品。
Modern methods for tracking polar bear populations have been employed only since the mid-1980s, and are expensive to perform consistently over a large area.
跟踪北极能种群的现代方法仅在20世纪80年代中期才被采用,而且,要在大范围内连续采用这种方法,其代价非常高昂。
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