... move long distance working in field. Features: 1. Mobile (trailer) type, completely closed structure, waterproof, dustproof, move easy. 2 ... shock absorber, braking system and steel welding of entire trailer guarantee 60km/h speed. 3. Dealing with unqualified ... fault, machine will be power off automatically. Advantages: Mobile (trailer) type, completely closed structure, waterproof, dustproof, it can ...