Objective: To investigate the effects of yak bone powder on the bone density, bone calcium content and bone calcium apparent absorption rate in rats.
目的：研究牦牛骨粉钙吸收率及对大鼠骨钙、骨密度的影响。
The application status of PVC resin with high apparent density and moderate oil-absorption rate in chemical building materials industry was introduced.
阐述了高表观密度和适中吸油率PV C树脂在化学建材业的使用效果。
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