GB/T 23144-2023纸和纸板弯曲挺度的测定两点法、三点法和四点法的通用原理国家标准
英文:Paper and board—Determination of bending stiffness—General principles for two-point, three-point and four-point metho...
英文:Paper and board—Determination of bending stiffness—General principles for two-point, three-point and four-point metho...