{HEAD ~ The apparatus} 1, wherein the gear and the balance shaft comprise {TAIL ~ cast iron}, which has a phosphorous component of at most 0.03 mass percent 
{ HEAD ~ The apparatus } 1 , wherein the gear and the balance shaft comprise { TAIL ~ cast iron } , which has a phosphorous component of at most 0.03 mass percent
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH