Bullet residue and primer particles were analyzed by scanning electron microscopy with energy dispersive analysis (SEM-EDA) and by flame and flameless atomic absorption spectrophotometry (AAS). The residue and particles were on cloth targets around entrance holes produced by bullets fired at distances of 10 to 200 m. Primer particles and their chemical constituents were almost always detected b...

The rubber tapping knives produced by blacksmiths have cracks and chipped even broken on their blades, so farmers must often replace them with new knives. Thus the product cannot be used for a long time has reduced economic value. cause of this made is easily damaged because gilding method not done properly. So was relatively low level hardness. This study aims to determine effect hardening que...