筑路机械是工程机械行业的一个重要分支。它的服务对象主要是交通运输业和其他基础设施领域，其市场需求状况与国家的经济形势、投资政策、重点工程规模和项目数量密切相关。因此，经济界通常把筑路机械划归国家基本投资拉动型行业范畴。按历年规律，一般每年二季度是筑路... Road construction machinery is an important branch of the construction machinery industry. Its service targets are mainly in the field of transportation and other infrastructure. Its market demand is closely related to the country’s economic situation, investment policies, key projects and the number of projects. Therefore, the economic community usually allocates road construction machinery to the category of national basic investment-driven industries. According to the laws of the calendar year, the general second quarter of each year is a road building ...