Users without electric power will be able to turn a wind - up handle to rechange the battery 用户在没有电的情况下将能够切换到转动手柄式的电池充电模式。
2.
Operation process and effect analysis of the method of planting conifers and protecting broad - leaves trees used in secondary forests rechange 次生林改造中栽针保阔途径的工艺过程及效果分析
