A method of identification for low content chrysotile, crocidolite and amosite in brakerubber of bicycle by the united way of polarized light microscope and X-ray diffraction had been established.
The large diameter super wide quality rubber wheel makes the user's ground effectively protected, and increases the friction of the brake.
大直径超宽优质橡胶车轮使得用户地面得到有效保护的同时，增大了制动的摩擦力。
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Large diameter ultra wide quality rubber wheel allows the user to obtain the effective protection of the ground at the same time, the lift increases the brake friction.