乔伊技术工程公司研制的3FCT型自行带式运输机,可与联邦德国克洛克纳贝柯里特公司研制的自行式运输机相竞争。两者的区别在于,3FCT型是从顶板单轨导向的2FCT型演变而来,在运输物料的同时能追随连续采矿机,而克洛克纳的运输机,当向它给料的设备重新定位时,必须卸空、举升、行走、再放下。此外,在运输机部分、 The 3FCT self-propelled belt conveyor, developed by Joy Engineering, competes with the self-propelled conveyor developed by the Federal Republic of Germany Klerk Naubert. The difference between the two is that the 3FCT model evolved from the monorail-oriented 2FCT roof to follow the continuous miner while transporting material, and that when it came to repositioning its feeder, Unloading, lifting, walking, and then down. In addition, in the transport aircraft section,