pencil hardness test

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[CN] Guangzhou Landtek Instruments Co. Ltd. [Manufacturer]
Key Products/Services:
Business Overview: Guangzhou Landtek Instruments Co. Ltd. is one of leading professional manufacturers of measuring instruments in China. Manufacturer & OEM Our instrumen...

[CN] Polygon manufacturing limited [Manufacturer]
Key Products/Services:
Business Overview: Established in 2005, Shenzhen Polygon Precision Instrument Limited is a specialized manufacturer of Portable Printer, Leeb Hardness Tester and Microscope. L...