1. Khái niệm về gia công cơ khí   !!!"#$% &'()*+,-./ 0(12131!)%45+3+6 (+2726*8+289(12 )2:(6*;2< 1+:='1>+,-(3 (>+,-21!!./?%8(':8 +7% @ 2$?A'1+ BC7D(3>8+% E8+%(F!:+%$ @ G$2 '2+%A!1(12!1&!2 !1(/+%HI+J KL:54MNO!2"2P22Q2 4+,A2(/!R E;JS+TA8+%6(U A18SA+A7RT(U AS+%A+A%T(HV) A8+% Tai nạn và các nguyên nhân thường xẩy ra: W >45+)%M+ :N XY7(M!U2XZ/!J2(/! XY#( @ !2XC1/ XCIA2X[-2)78(+2 XE+2O!2"2X\"(" B]+,I ^+,II+N X7*"552 X75%P75%7#+ 42 XY!/3%+7#2 X_!,`2K+!2K+L:a$?+2 X_!K+A4b2A41!2 XC31(1:QN:2)82F(K ,`!Q! XEP 4b424b/ XZ"!4!+,(/12!`!`2U "! . 1. Khái niệm về gia công cơ khí  