To investigate the hydrochemical characteristics and water quality of the shallow groundwater in Guangzhou and the potential human health risks posed by the nitrates in the shallow groundwater. this study collected 132 shallow groundwater samples in Guangzhou during November 2014 to February 2015. The hydrochemical characteristics of the shallow groundwater in Guangzhou were analyzed ... https://unitedssports.shop/product-category/bike-units-comfort-step-over/