sentence: For example , on the electro - pneumatic control training course , the operator must wear a face mask when the machine is on to protect them from being hit by the tube with high pressure air . Likewise , it is also a necessary measure to start the machine after you are fully prepared with a face mask .
modified: For example , in the electro - pneumatic control training course , the operator must wear face mask when the machine is on to protect from hitting by the tube with high pressure air , likewise , it is also a necessary measure to start the machine after you are fully prepared with a face mask .
transformation: PREP, DET, PRON, VERB:TENSE, PUNCT