... roller, dyeing and finishing roller, warp sizing roller, non-woven fabric roller and other parts, With quality to ... subject in next step, utilizing the steel jade sand No.:80~100, 0.4mpa~0.6mpa compressive stress, ... priming coating: Rolling about 120 rotation per minute, no less than 2.0 hours at a time before ... putting the priming coating to use, no less than once time every week for rolling ...