comprehensive control of respirable dust in coal mines

1、

test method for respirable dust in workplace atmospheres

工厂周围大气中可吸入粉尘的试验方法

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2、

study on experimental respirable dust and filter efficiency of filter film

试验呼吸性粉尘及防尘滤料性能研究

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3、

standard test method for respirable dust in workplace atmospheres

工厂场所大气中可吸入粉尘的标准试验方法

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4、

research on the effect assessment of respirable dust control in geological exploration industry

地勘行业呼吸性粉尘控制效果评价的研究

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5、

evaluation on characteristic flow load test of respirable dust personal sampler

呼吸性粉尘个体采样器流量负载特性的测试评价

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6、

research about harm distribution of respirable dust in metallurgy industry

冶金工厂呼吸性粉尘危害分布的研究

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7、

discussion on principle and design of impactor for respirable dust sampling in underground mine

煤矿呼吸性粉尘冲击采样器原理与设计探讨

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8、

experimental method for preparing standard respirable dust filter samples

制备标准呼吸性粉尘滤膜样品的实验方法研究

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9、

determination and analysis of total dust concentration and respirable dust concentration in welding fume

电焊烟尘中总粉尘与呼吸性粉尘浓度的测定与分析

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10、

development of a method for simultaneous monitoring of respirable dust and radon daughters in mine

矿井作业场所中呼吸尘与氡子体同时监测的方法研究

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11、

spray pressure and spray nozzle model have obvious effect on the respirable dust removal efficiency.

喷雾压力和雾化喷嘴型号对呼吸性粉尘的除尘效率的影响都很显著；

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12、

yields on long-term government bonds

长期政府债券所得

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13、

the federal reserve is buying up all kinds of other assets, like long-term government bonds.

联储，正在收购各种各样的资产，像政府的长期债券。

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14、

sold long-term government bonds, the price is $20, and the cost is $2.

销售长期政府债券，售价为20美元，原成本为2美元。

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15、

sold long-term government bonds, the price is $100, and the cost is $10.

销售长期政府债券，售价为100美元，成本为10美元。

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16、

if you believe the first one, you will fear future inflation and you will sell long-term government bonds.

假如你相信第一个阵营，你会担忧未来的通胀，于是你就会卖出长期国债。

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17、

central banks buy long-term government bonds with newly printed money.

中央银行们新发行货币购买长期政府债券。

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18、

it now says that it will reinvest the proceeds from maturing securities in long-term government bonds.

现在的提法是它将把到期证券的收入再投资于长期政府债券。

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19、

and long-term government bonds, while near record lows, are still paying decent money considering the tumultuous climate.

而长期政府债券，却还在历史低点附近，考虑到目前的混乱局面，其收益仍然相当不错。

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20、

clinging to cash equivalents or long-term government bonds at present yields is almost certainly a terrible policy if continued for long.

继续长久持有现金等价物或以现在的收益率持有长期政府债券必然是一个可怕的政策。

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