rosin bag

英 美
  • 松脂粉袋
  • bag n.袋;袋状物;包;一袋的量vt.把...装进袋子;使膨胀;猎杀vi.(如袋子般)松垂
  • rosin n.松香;树脂
Noun:
  1. a bag filled with rosin; used by baseball pitchers to improve their grip on the ball