Tungsten carbide iṣelọpọ: Lilo awọn ohun elo wundia mimọ giga fun agbara giga ati yiya resistance nipasẹ iṣakoso ilana deede.
Adirẹsi imeeli rẹ kii yoo ṣe atẹjade. Awọn aaye ti a beere ni samisi pẹlu *