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磷矿粉
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磷矿粉
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磷矿粉
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phosphate rock powder
磷矿粉
由磷灰石、氟磷石等磷矿石直接用机械粉碎而成的含磷矿物粉末。一般细度要求90%的粉体通过100目筛孔,最大粒径为0.149毫米。是一种难溶性的磷肥。
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Wide-Field Infrared Survey Telescope
wide-field spectrograph
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更新时间:2026/9/13 15:22:28