All provide a reliable reference for the design of focusing coil and beam test.
上述工作为确定聚焦线圈的设计方案和加速器的出束实验提供了可靠、丰富的数据。
But, with the improvement of material and technology, electricity coil focusing still desirable at some situation.
但是，随着绕制线包的材料和工艺的改进，线包聚焦在一些场合还是可取的。
But, with the improvement of material and technology, electricity coil focusing still desirable at some situation.
但是，随着绕制线包的材料和工艺的改进，线包聚焦在一些场合还是可取的。
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