非常感谢!帮忙再解析一下以下问题: 1)7/16 drill 2.00 deep to drill point 1/4-18 N.P.T - 4 Holes(water in & out) 2)11/32 drill 1.91 deep to drill point 1/8-27 N.P.T - one hole(air in ) 3)use solid model for front of core. (我知道CORE是型芯) 4)drill & ream for 1/4 dowel 2 places(S.F.) 5) 7/16 drill 0.63 deep for DME TBP-20 PLUG-2 HOLES 6) DRILL THRU & C'BORE FOR 3/8 S.H.C.S.-8 HOLES