中zhong央yang控kong製zhi麵mian板ban集ji成cheng雙shuang刀dao狀zhuang態tai指zhi示shi燈deng與yu獨du立li調tiao速su旋xuan鈕niu，操cao作zuo者zhe可ke直zhi觀guan掌zhang握wo兩liang側ce加jia工gong進jin度du，必bi要yao時shi可ke單dan獨du暫zan停ting某mou側ce刀dao頭tou進jin行xing幹gan預yu調tiao整zheng。雙shuang獨du立li伺si服fu驅qu動dong係xi統tong分fen別bie控kong製zhi兩liang側ce刀dao頭tou進jin給gei，即ji可ke同tong步bu執zhi行xing相xiang同tong參can數shu加jia工gong
，也ye能neng按an需xu設she置zhi差cha異yi化hua切qie削xue模mo式shi
，滿man足zu特te殊shu工gong件jian兩liang端duan不bu同tong倒dao角jiao角jiao度du的de工gong藝yi要yao求qiu。