In addition, several tens of thousands of seabirds are reckoned to be killed every year by an entangling mass of flotsam-fishing gear, grocery bags and the like.
另外，每年约摸有一万多的鸟被水上残骸缠死——诸如一些捕鱼装置，食品袋。
On the basis of exploration and demonstration, SBSD bulk setter and mass flowmeter was combined to replace the oval gear setters.
在考察、论证的基础上，用SBSD批量给定器和质量流量计配套使用来代替椭圆齿轮设定器。
The model is used to understand a series of formulae, for example, mean single tooth stiffness, gear pair mesh synthesizing stiffness, effective mass, nature frequency and critical rotating speed.
根据这一振动模型，推导了齿轮副的平均单齿刚度、单对轮齿啮合综合刚度、有效质量、固有频率与临界转速等一系列计算公式。
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