The first appeared two years ago when Valley introduced its X-Tec Drive with a top speed of 37.5 feet per minute.
ຄັ້ງ ທໍາ ອິດໄດ້ປະກົດຕົວເມື່ອສອງປີກ່ອນເມື່ອ Valley ແນະ ນໍາ X-Tec Drive ດ້ວຍຄວາມໄວສູງສຸດ 37.5 ຟຸດຕໍ່ນາທີ.