{HEAD ~ The degrees} of the irregularity can be controlled by modifying {TAIL ~ the feed control pattern}, for example the magnitude of the feed rate, the time pitch between the high rate feed and the low rate feed, and by controlling the operation carefully, the roughness of the irregularity can be restrained to a certain level 
controlled by modifying
{ HEAD ~ The degrees } of the irregularity can be controlled by modifying { TAIL ~ the feed control pattern } , for example the magnitude of the feed rate , the time pitch between the high rate feed and the low rate feed , and by controlling the operation carefully , the roughness of the irregularity can be restrained to a certain level
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH