stemmer
  除梗機; 導火線; 炮棍
  Stem·mer n. One who, or that which, stems (in any of the senses of the verbs).
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  stemmer
       n 1: a worker who strips the stems from moistened tobacco leaves
            and binds the leaves together into books [syn: stripper,
             sprigger]
       2: a worker who makes or applies stems for artificial flowers
       3: an algorithm for removing inflectional and derivational
          endings in order to reduce word forms to a common stem
          [syn: stemming algorithm]
       4: a miner's tamping bar for ramming packing in over a blasting
          charge
       5: a device for removing stems from fruit (as from grapes or
          apples)