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1987年时,日本大阪府建人工浴场需用白色天然理石,我国建材部门在东沟县找到资源,却不是天然卵石。县乡镇企业局根据水泥制成原理,用球磨机将白理石加工成卵石,可以与天然理石媲美.1988年6月,中日双方签订合同,加工第一批1.1×10~4m~3白卵石;同年9月第一船交货.这一船雪白晶亮的卵石铺进日本海里,传来日方评价:中
In 1987, the artificial bathing beach in Osaka prefecture, Japan required white natural marble. Our building materials department found resources in Donggou County, but it is not a natural pebble. According to the principle of cement made by the County Bureau of Township Enterprises, the marble is processed into a pebble by a ball mill which is comparable to natural marble. In June 1988, China and Japan signed a contract to process the first batch of 1.1 × 10 ~ 4m ~ 3 white pebbles; In the same year in September the first ship delivery.This boat bright white pebble spread into the sea of Japan, came Japan evaluation: