Excavating machines; [ cranes; dredgers in the nature of dredging machines; trenchers in the nature of trench cutters; ploughs; ] stone and rock picking machines in the nature of machines used for clearing land by collecting and picking up loose stones and rocks; [ stone and rock handling and spreading machines in the nature of machines used for distributing stones and rocks evenly; attachments for earth moving machines, namely, rollers; pole erecting machines, concrete mixers and parts and fittings for all the aforesaid machines; ] attachments for earth moving machines, namely, buckets, hooks, spades, [ forks, ] grabs, crushers used for crushing cement and rebar, [ screening buckets, ] quick couplers in the nature of couplers used for connecting attachments to earth moving machines, rippers used for excavating hard ground materials and demolition, excavator bucket thumbs, and parts and fittings thereof