conversion of null field [计] 空字段转换
null field equivalent current 零场等效源
null-field boundary integral equation 零场积分方程
null-capable field 可使用空值的栏位
One-to-one relationship or NULL field for optional column?
一对一的关系或空字段为可选的列？
A null field descriptor is the descriptor that forms the blank division in export.
一个空白字段描述符是在输出中形成空格的描述符。
The condition that plasma breakdown on Tokmak is get enough high loop voltage and large null field region in the vacuum vessel area.
托卡马克装置产生等离子体击穿的条件是在真空室区域中达到足够大的环电压以及尽可能大的零场区。
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