Jigger reform by SANKEN transducer
SANKEN变频器对卷染机的改造
The nipples having cilium , sanken having or not cilium and little holes are distributed symmetrically around the oral sucker of cercariae .
尾蚴的口吸盘周围对称分布着有纤毛的乳突，有或无纤毛的凹陷及小孔；
sanken