发动机起动延时继电器
time delay engine start relay
发动机起动预检查
preliminary engine starting check
发动机起动准备
engine starting preparation
发动机起动自耦变压器
motorstarting autotransformer
发动机气动特性
engine pneumatic characteristics
发动机气缸情况
engine cylinder condition
发动机气缸套拆卸、安装
Dismounting and mounting of engines cylinder bore