还有一点.机械专业英语怎么翻译下面的文章?跪求达人.1.1.PilotingPilotingisoneoftheessentialactivitiesinstriplayoutdesignforprogressivedies.Thestripmustbepositionedaccuratelyineachstationsothattheoperatio

　　还有一点.机械专业英语怎么翻译下面的文章?跪求达人.

　　1.1.Piloting

　　Pilotingisoneoftheessentialactivitiesinstriplayoutdesignforprogressivedies.Thestripmustbepositionedaccuratelyineachstationsothattheoperationsareperformedattheproperlocations.

　　Generally,therearethreekindsofpilotinginprogressivedies.Whenoneortwocircularholesofthepartareusedforpilotingtheyarecalleddirectpilots.Whenoneortwocircularholesarecreatedinthescrapareaandusedforpilotingtheyarecalledindirectpilots.Whencircularholesarecreatedinsidethenoncircularholesofthepartforpilotingpurposesandinthelaststation,theentireholesarepunchedintothedesiredshapetheyarecalledsemi-directpilots.

　　AholeisconsideredtobesuitableasapilotholeifitiscircularandItsdiameterisgreaterthananallowableminimumdiameter.Ifthediameterofthepilotisnotlargeenoughitcaneasilybedeflectedorevenbrokenduringoperation.Thepilotholealsoshouldbelocatedfarenoughfromotherholesoftheworkpiece.Ifthescrapareaisusedforindirectpiloting,theamountofincreaseinstripwidthshouldbeminimum.