The design blasting parameters, blasting net, delay time, defending measure selection and gap length determination in complicated environment are discussed.
探讨在复杂环境条件下爆破参数、爆破网路、延时时间、安全防护措施的选择和爆破切口范围的确定。
Using the length-determination method, an analytical solution of the relation between natural frequencies and shell lengths with arbitrary boundary conditions is obtained.
利用长度待定法，得到壳体在任意边界条件下固有频率与壳长关系的精确解。
Using the length-determination method, an analytical solution of the relation between natural frequencies and shell lengths with arbitrary boundary conditions is obtained.
利用长度待定法，得到壳体在任意边界条件下固有频率与壳长关系的精确解。
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