初夏微凉降速度及运动规律进行了探索，而要全面揭示进一步研究钉螺在各种流态动水条件下的运动规律，方能客观阐述并有的放矢提出相应的防
6沙玉清著。泥沙运动学引论中国工业出版社。 1 6￣ 9 35 2 — 6
万兆 9 3钉螺在江河水系中运动和扩散的规律，还必须 7钱宁，惠合著。记沙话动力学科学出版社 1 8 )1 1 - 0
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