website:https://www.jhmindustry.com/
Shanghai Jian & Mei Industry and Trade Co., Ltd. is the company which manufacture and export fasteners and metal hardware, founded in 2006, with import-export authority. Now, 80% products export to all over the world and 20% sell in domestic market.
https://www.universalgripco.com/#!astm-e23/zkr7j
A quick strain map video of a Charpy Impact Test performed on an Impact Tester from Universal Grip.