资金成本应成为衡量机械效益的首要标志宋丽珍公路机械是保证完成各项公路建养任务的重要工具，是确保工程质量、加快工程进度，改善劳动条件的重要手段，是实现公路建养机械化的重要物质基础。正因为如此，各级公路部门都比较重视和依赖机械高质量、高速度地完成各项任务... The cost of capital should become the primary measure of mechanical efficiency Song Li-zhen Highway machinery is an important tool to ensure the completion of various tasks of highway construction, is to ensure project quality, speed up the progress of the project, an important means to improve working conditions, is to achieve the mechanization of highway construction Material basis. Because of this, the highway departments at all levels pay more attention to and rely on the mechanical high-quality, high-speed completion of various tasks ...