The irradiating method of small caliber cube radial needs elliptical irradiating, because the irradiating section's thickness has big change, irradiating situation is especial.
小径管射线透照一般都要求椭圆透照，由于透照截面厚度变化大，透照情况比较特殊。
The irradiating method of small caliber cube radial needs elliptical irradiating, because the irradiating section's thickness has big change, irradiating situation is especial.
小径管射线透照一般都要求椭圆透照，由于透照截面厚度变化大，透照情况比较特殊。
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