Txhua series ntawm cov hlau stamping

Cov yam ntxwv tsis xws luag yam ntawm cov hlau stamping qhov chaw:

Kev tawg: cov khoom siv hlau tawg thaum lub thwj cim

Kos: ib daim kab xev-puab ntiav ntiav rau ntawm cov khoom siv

Kos: kev puas tsuaj los ntawm kev sib cuag thiab kev sib txhuam ntawm cov khoom siv

Oxidation: cov khoom hloov pauv tshuaj nrog cov pa oxygen hauv huab cua

Kev hloov pauv: pom qhov sib txawv tshwm sim los ntawm cov khoom siv thaum lub thwj cim lossis hloov pauv

Burr: cov khoom seem tsis tshuav tag nrho thaum lub sijhawm xuas nrig lossis txiav kaum

Convex Dent: qhov txawv txav los yog kev nyuaj siab ntawm cov khoom siv

Tuag cim: cim sab laug los ntawm kev tuag ntawm cov khoom siv thaum lub sijhawm thwj

Stain: roj stain lossis av txuas rau nws saum npoo thaum ua