▁the ▁coordinates ▁is ▁not ▁specified . ▁This ▁file ▁is ▁meaning less ▁without ▁additional ▁information , ▁typically ▁put ▁in ▁a ▁free ▁format ▁human ▁readable ▁tool ▁file . ▁This ▁information ▁must ▁be ▁re - enter ed ▁manually ▁by ▁the ▁C AD / C AM ▁operator , ▁with ▁unnecessary ▁manual ▁labor ▁and ▁risk ▁of ▁del ays ▁or ▁errors . ▁A ston ish ingly , ▁such ▁en ig m atic ▁files ▁are ▁still ▁used . ▁ ▁See ▁also ▁Ger ber ▁format , ▁which ▁can ▁also ▁transfer ▁dr ill ▁information ▁ ▁References ▁ ▁External ▁links ▁ ▁IP C - NC - 3 4 9 ▁specification ▁( pay able ) ▁ ▁X NC ▁format ▁specification ▁ ▁Form er ▁Ex cell on ▁format ▁description ▁( arch ived ▁from ▁the ▁original ▁on ▁ 2 0 0 7 - 1 0 - 3 0 ) ▁ ▁PC B ▁Fab ric ation ▁Data ▁- ▁A ▁Guide ▁ ▁Category : Print ed ▁circuit ▁board ▁manufact uring <0x0A> </s> ▁William ▁Le a ▁Ch amb ers ▁( 1 8 5 2 – 1 9 3 3 ), ▁United ▁States ▁Federal ▁Judge ▁Robert ▁Ch amb ers ▁( English ▁judge ) ▁( 1 7 3 7 – 1 8 0 3 ) ▁Tom ▁Ch amb ers ▁( jud ge ), ▁Associ ate ▁Justice ▁of ▁the ▁Washington ▁State ▁Supreme ▁Court <0x0A> </s> ▁Pierre ▁du ▁R yer ▁( 1 6 0 6 ▁– ▁ 6 ▁November ▁ 1 6 5 8 ) ▁was ▁a ▁French ▁dram at ist . ▁ ▁Life ▁ ▁and ▁works ▁Du ▁R yer ▁was ▁born ▁in