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(一)苏联“BMM”型海洋流速仪的研究苏联1955年出品的“BMM”新型海洋流速仪附有流向指示器,不仅能施测流速,还可定出水底流向,我们研究了这类仪器的性能,感到除装置手续复杂外,尚有下列几个缺点: 1.仪器全部转动时,齿轮暴露于水内,因受泥沙磨耗,将迅速失效; 2.每测一点,必须提出水面,清点磁针盘内分度格中之弹子数目,迁到水深之处,每一垂线均需进行
(A) the Soviet Union “BMM” type ocean current velocity meter The Soviet Union in 1955 produced “BMM” new type of marine anemometer attached to the flow indicator, not only the flow rate can be measured, but also set the bottom flow, we studied this type of instrument Performance, I feel that in addition to the complex procedures, there are the following disadvantages: 1. All the instruments are rotated, the gear exposed to water, due to sediment wear, failure will be rapid; 2. Each measured point, we must propose the water surface, Count the number of pins in the graduation grid, move to the depth of the water, each perpendicular to be carried out