The eccentric mass type vibration generators are bolted to the platform.
偏心量型式的振动发生器锚固在台身上。
The ultrasonography could be divided into three types : gestational sac type , mass type and ruptured type.
声像图表现为孕囊型、包块型、破裂型三种。
Results According to the sonograms, these cases were classified into substantial mass type, cystoid fluid type and mixed type.
结果根据声像表现将其分为实质肿块型、囊样液化型、 混合型三类。
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