Results show that paper bulk, bending stiffness, and opacity can be improved significantly by both aspen and birch HYPs.
结果表明，杨木hyp和桦木hyp可显著提高纸张松厚度、挺度及不透明度。
In recent years, great development have been obtained on production and application technologies of high yield pulps (HYPs).
近几年来，高得率浆的生产与应用技术逐渐受到人们的重视，并得到大力发展。
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