Isolation and determination for l - form variation of mycobacterium tuberculosis 型的形成及其分离与鉴定
2.
Laboratory research on l - form variation and pathogenicity of vibrio cholerae o 型变异和诱导实验的观察及致病性的探讨
3.
Diversity between new type damping spring and common spring is its damper form variation and coefficient of damping increment 新型阻尼弹簧与普通弹簧的区别是阻尼表现形式的变化和阻尼系数值显著增加。