采购产品书桌配件, 钢笔和书写工具, 圆珠笔钢笔, 引导电笔, 多功能钢笔.Desk Accessories, Pens and Writing Instruments, Ballpoint Pens, Led Light Pens, Multifunctional Pens.本文针对当前发展的要求,采用微小角度检测原理,提出了一种多参数签名鉴定电笔.This paper presents an electrical pen for s...
At very high temperatures, more endothermic reactions play a role.在很高的温度下, 更多的吸热反应起作用.High temperatures also result in high evaporation from the plants.高温也导致了植物水分的大量蒸发。I clean out all the grease and replace it with oil s...