One copy of each following hand books and manuals in English shall be provided with each vehiclea. Hand book containing all information necessary for the effective maintenance and operation of the vehicle including comprehensive general description of the equipment together with wiring piping and control diagram.b. Work shop manual covering the pumping and foam making equipmentC. Spare parts book containing details, including manufacturer name, type and parts number etc.d. The supplier shall be able to supply the spare parts for the period of at least 15 years when necessary.