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单词
single superphosphate
释义
single superphosphate
Encyclopedia
工学
湿法磷肥
释
single superphosphate
过磷酸钙
用硫酸分解磷矿直接制得的磷肥。又称普通过磷酸钙,简称普钙。主要有用组分是磷酸二氢钙的水合物[Ca(H2PO4)2·H2O]和少量游离的磷酸,还含有无水硫酸钙组分(对缺硫土壤有用)。过磷酸钙含有效五氧化二磷为14%~20%(其中80%~95%溶于水),属于水溶性速效磷肥,灰色或灰白色粉料或颗粒料(由粉料造粒制成),可直接作磷肥,也可作制复合肥料的配料。
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speed control technology of DC electric drive
speed counter
speed distribution
speed distribution law of ideal gas molecules
speeder of vehicle
speed governor of turbine
speed gradient
speed increaser
speeding driving
speeding monitoring and recording system
speed lens
speed management
speed measure
speed measurement
speed measurement technology
speed of convergence
speed of economic growth
speed of light
speed of light circle
speed of order k
speed of photographic plate
speed of rotation of the ecliptic
speed of sound
speedometer
speed pulser
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