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PURPOSE:To obtain a mechanical vibration-proofer which is superior in a high temperature resistant quality and does not deteriorate in radial rays, at a vibration proofer provided at an atomic power plant or the like, by using for a ball screw shaft and balls a ball screw painted or covered...
108招炒股小技巧(经典) 01、上涨之前的特征:第一,成交量必须有所变化,股价未涨量先涨,温和放量是股价加速的有效条件;第二,股价突破并站稳在五日均线之上。 02、第一次上涨途中出现缩量涨停最安全。 03...