推土机和平地机都装有液压松土机构，它的主要功用是破碎原生土和坚硬上层，以减少推铲作业阻力。当推土机或平地机在作业中遇到坚硬上层难以直接下铲时，即可利用松土器先将硬立松动，然后再进行推土或平地作业。松土时的一般作业方法是主机向前行驶完成松土作业，松土的深度 Bulldozers and graders are equipped with hydraulic ripper, its main function is to crush the native soil and hard top, in order to reduce push blade work resistance. When a bulldozer or grader encounters hard tops that can not be directly shoveling during operations, you can use the ripper to loosen the hardwoods first and then push or flatten the ground. Loose soil when the general method of operation is the host forward to complete the loose soil operations, the depth of loose soil