不要忘了防摩擦剂。
产品说明：该产品能将铜的氧化物还原，并带有一定的摩擦剂可以彻底去除铜锈，并且不伤铜材本身。
Instructions: the product can deoxidize the coppers. It contains certain friction producing substance and can remove the rust completely without damage the copper.
很少有美白牙膏经过任何形式的临床试验，有些美白牙膏摩擦剂含量过多，会伤害你的牙齿或让你的牙齿变得过分敏感。
Very few whitening toothpastes have undergone any type of clinical trial, and ones that are too abrasive can damage teeth or make them very sensitive.
本文对牙膏中的一些活性原料进行了综述。对阳离子表面活性剂、 摩擦剂、酶及各种维生素在牙膏中的作用进行了研究。
The basic functional ingredients used in toothpaste are reviewed in this paper. The effectiveness of cationic ingredients, abrasives, enzymes and all kinds of vitamins in toothpaste are researched.
结论采用冷酸解离-氟离子电极法测定单氟磷酸钠与钙类摩擦剂配伍的含氟牙膏中的总氟含量，具有准确可靠、简便易行的优点。
Conclusion the amount of total fluoride in the calcium containing toothpaste can be detected simply and accurately measured by acid diffusion and fluoride selective electrode.
摩擦系数由不含成核剂时的0.19894降低到了0.18121；SEM表明其结晶形态为摺叠扭曲形波浪起伏结构。
The frictional coefficient decreased from 0.19894 to 0.18121. SEM indicated that the crystal morphology was changed by REC.
不含添加剂的聚氨酯聚合物有极高的摩擦系数。
Polyurethane polymer containing no additives has a high coefficient of friction.
由于纳米材料具有很多独特的优点，因此纳米添加剂在摩擦学中得到了广泛的应用，最近又发现在噪声控制方面纳米添加剂具有一定的优势。
Nano-materials have a lot of excellence of specialty, so nanoadditives have a large application in tribology, recently the advantages of nanoadditives in control of noise have been found.
因此，通过在黏膜黏着剂上打洞或者关闭空穴可能可以增加摩擦力的程度。
It is therefore possible to influence the degree of friction by creating holes in the muco-adhesive or indeed by closing the holes.
这种偶联剂使复合材料的抗冲击强度明显提高、硬度降低、耐磨性有较大的提高而摩擦系数略有降低。
The coupling agent can evidently increase impact strength of the composite. Coupling agent, lower the hardness and friction coefficient o…
本公开涉及式I化合物或它们的摩擦学上可接受的盐、溶剂化物、水合物或前添加剂，其中R1、R2和R4如本文所定义。
The present disclosure relates to a compound of the formula I or a tribologically acceptable salt, solvate, hydrate, or proadditive thereof, wherein R1, R2 and R4 are as defined herein.
本公开涉及式I化合物或它们的摩擦学上可接受的盐、溶剂化物、水合物或前添加剂，其中R1、R2和R4如本文所定义。
The present disclosure relates to a compound of the formula I or a tribologically acceptable salt, solvate, hydrate, or proadditive thereof, wherein R1, R2 and R4 are as defined herein.
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