造雪机依靠的是热力学原理，但有时候物理手段的作用有限。
Snowmaking machines employ a few thermodynamic tricks to help, but at times there is a limit to what physics can do.
利用由雪耙模型导出的Z箍缩聚爆时间表达式，并结合“强光一号”Z箍缩实验结果，修正了由一维等熵气体动力学得到的喷嘴气流线质量表达式。
Combining the data of gas puff Z pinch experiments on Qiangguang I generator, the expression of the line mass is obtained using the implosion time expression which is deduced from snow-plow model.
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