单词：rotary type soil stabilizer
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Once A Regional Stabilizer, Saudi Arabia Becomes A Disrupter MARY LOUISE KELLY, HOST: For generations, Saudi Arabia's monarchs have based their rule on tradition and caution and, above all, stability. Crown Prince Mohammed bin Salman represents a bre
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This is the VOA Special English Agriculture Report. Farmers and gardeners have turned the soil for centuries. But many now believe in no-till or reduced tillage, a method also called conservation tillage. The Conservation Technology Information Cente
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1975 、 双圆头锤 blockinghammer 1976 、 双极面结型晶体管 bipolarjunctiontransistor 1977 、 双线规；榫规 mortisegauge 1978 、 双头砂轮机 double-endedgrinder 1979 、 双头螺栓
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Mars Rover to Begin Taking Soil Samples This Week Jessica Berman NASA engineers say the Mars rover will begin taking its first soil samples as soon as it departs the landing platform . Engineers say t
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This is the VOA Special English Development Report. An Afghan girl receives a dose of polio vaccine The World Health Organization has begun to use a new vaccine against polio. Officials say it will become a major tool in the campaign to end a disease
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