机务工程队《维修管理手册》需由（ ）进行批准

149.Opentheleft (right)access panelL42(R42).

148.Tightenthe bolts inthesequencethat is given in figure 3.

147.Disassemble this unit into two parts.

146.Increasethepressureslowly (not more than oneturn each minute)

145.You cansee the cable through the inspectionhole

144.Make surethat the platform issafe before youlift it.

143.Get a sample of the fuel andmeasure its specificgravity

142.Gives the safety instructions that areapplicable to explosive items

141.Do not change the routingof the pipe

140.The correctness of thisadjustment is important.