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浏览/检索结果: 共3条，第1-3条 帮助 限定条件 内容类型：专利     已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 Non-woven cloth annular filler SNAD technique involves using non-woven cloth and outer layer composition, fixing non-woven cloth on outer layer of biological filter chamber as filler, monitoring, and completing autotrophic denitrification. 专利 申请日期: 2015-01-01, 公开日期: 2015-04-22 作者:  XU X YANG F ZOU Y JIN W 收藏  |  浏览/下载：6/0  |  提交时间：2019/12/09 Removal of boron impurity in polycrystalline silicon by heating silicon powder via high-temperature heating furnace to form silicon oxide film having oxidized surface, and contacting film with electron beam in electron beam melting furnace. 专利 申请日期: 2010-01-01, 公开日期: 2010-11-24 作者:  DONG W TAN Y JIANG D ZOU R 收藏  |  浏览/下载：2/0  |  提交时间：2019/12/24 Purification of polysilicon by electron beam gradient smelting, realizing directed solidifying effect while removing volatile impurity phosphorus by changing size of electron beam and generating distribution of different energy values. 专利 申请日期: 2010-01-01, 公开日期: 2010-12-08 作者:  DONG W GU Z TAN Y JIANG D ZOU R 收藏  |  浏览/下载：2/0  |  提交时间：2019/12/24