leco

501-147 SAAR148 1g Copper Pin Standard High Oxygen, 489 PPM O, 6 PPM S     100 pcs  铜钉标样 

501-148 SAAR149 1g Copper Pin Standard High Oxygen, 323 PPM O, 11 PPM S 100 pcs  铜标样

501-645 SAAR1651 1g O/N in Steel Pin Standard , 0.0057% O, 0.0210% N 100   钢中氧氮标样

762-747 SAAR546 1g Hydrogen in Steel Pin Standard , 1.1 PPM H 100pcs   钢中氢标样

501-529 /502-060  SAAR556 1g Hydrogen in Steel Pin Standard , 5.0 PPM H 100    钢中氢标样