i did change my work position.i did work previor position until 10am. i took a break time and i got my apron, knife, metal gloves ETC....and i learn sharpen knife method. and i finally start work knife hand this factory.but anyone don't teached me. So i did stand moment.i finally start work. That's Cow's stomach wash work.that work simillar my previous work. but very heavy. So i shocked my back...