Copper Wideband Serving Section (telecommunications)铜宽带服务(电信) Civil War Soldiers and Sailors士兵和水手内战 Cooling Water Supply System冷水供应系统 Common Weakness Scoring System常见的弱点得分系统 Chicago Women’s School of Sociology Cold Weather Sleep System寒冷的天气睡眠系统 California Weed Science Society加州的杂草科学协会 Canadian Weed Science Society加拿大的杂草科学的社会 Combat Water Safety Swimmer (USMC)战斗水安全游泳(符合美国海军陆战队的) Community Water Supply Study (EPA)社区供水研究(EPA)