clasp knife

1. The boy is too young to shut a clasp knife.
   小男孩太小，还合不上折刀。
2. Application of chop nucleus with clasp and knife in the capsular bag in small-incision non-phacoemulsification
   钩刀劈裂法在非超声乳化小切口白内障囊袋内劈核术中的临床应用

noun

1. a large knife with one or more folding blades

   Synonym:    jackknife