A battered white Toyota left the compound, bristling with men, beards and guns, and sped away between paddy fields that shone like a splintered silver mirror.
The effect, called a light echo, has been unveiling never-before-seen dust patterns ever since the star suddenly brightened for several weeks in early 2002.
Recent surveys of the sky in near-infrared light, which penetrates the dust clouds that block our view of the galactic core, have revealed the bar directly and dispelled the remaining doubts.
The two laser beam system has been used to measure the relative density of linen dust, with the feature of wide measurement range, good sensitivity and restraining the intensity fluctuation noise.
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9. 用途：适用于抛光、擦光、去尘、填充、上蜡等。
Application: applicable for polishing, burnishing, dedusting, filling, waxing, etc.
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10. 介绍了多波长消光法测尘的测量原理。分析了计算机辅助粉尘检测系统和工作原理。
A multi-wave-length extinction detection method for dust is put forward. Then the principle and a principal designing scheme are given.
The dustless lead fumarate composite stabilizer has better heat stability, photostability and lubricity. Its characteristics and heat stability in PVC are better than those of other lead salts.
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12. 由于光散射式数字式粉尘测试仪性能稳定、灵敏度高，测量方便而广泛的应用于各类测尘应用。
Since the digital light scattering dust test instrument is quite steady, sensitive and convenient in measurement, it can be used in many kinds of dust testing applications.
