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黑钙土
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黑钙土
温带半干润气候地区草原植被条件下形成的,表层具有深厚腐殖质层、下部具有钙积层或石灰反应的土壤。在中国土壤系统分类为均腐土纲,半干润均腐土亚纲;在美国土壤系统分类中,黑钙土属于软土纲的多种类型:冷冻性冷凉软土、黏化冷冻软土、钙化冷凉软土、黏化半干润软土、弱发育半干润软土、钙质半干润软土等。
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optical fiber
optical fiber amplifier
optical fiber and cable
optical fiber and optical communication
optical fiber biosensor
optical fiber cable
optical fiber communication
optical fiber connector
optical fiber device
optical fiber dispersion compensation
optical fiber face plate
optical fiber flange adapter
optical fiber for communication
optical fiber geophone
optical fiber identifier
optical fiber interferometer
optical fiber measurement
optical fiber measurement principle
optical fiber monitoring technology in civil Engineering
optical fiber nonlinear effect compensation
optical fiber pigtail
optical fiber positioning technology
optical fibers
optical fiber scrambler
optical fiber sensing network
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