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What is Product Quality Certification and Quality Management System Certification? What are the Organizations?

Certification definition: According to the ISO and the IEC, certification refers to the certification body recognized by the state to prove that an organization's products, services, management systems comply with relevant standards, technical specifications or mandatory requirements of conformity assessment activities.…

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Testing Standards for Mechanical Properties of Common Organic Polymer Materials

Organic polymer materials, also known as molecular materials or high polymer, mechanical properties of which are strength, stiffness, hardness, plasticity, and toughness. Indicators reflecting these mechanical properties include yield strength, tensile strength, elongation, section shrinkage, impact toughness, fatigue limit, fracture…

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