承包商安全管理教材
链接：河北安全生产微安全 https://mp.weixin.qq.com/s?__biz=MzA4MzE5ODMwMQ==&mid=2650432757&idx=1&sn=f6eed0b9dd73accb22e5d500fd49b797&chksm=87f4ecc7b08365d1b91f7439db1667b1f271b2d215489409af56fcaa5ff82c87d1cb97a7ad8a&mpshare=1&scene=23&srcid=#rd