portable fire extinguisher是什么意思

网络释义

用法例句

Many modifications have been done including weight reduction, power increment, portability modifications to hydraulic pump station and system assembly, as well as utilizing trailer engine powered air compressor and screw type air compressor.

针对输电线路施工中山区岩石锚杆型式基础越来越多的出现,原有MZ65Y锚杆钻机重量大、效率低,已经不能满足大量锚杆基础施工的要求,在将小车发动机用于空压机组、采用螺杆式空压机、对液压泵站及整体组装进行了减重增力、轻便化、精确化改造后,经运行检验,新一代螺杆式锚杆钻机具有较高工效、较高精确性、运转可靠、运输便利、使用成本低的特点,能够满足输电线路建设中大量锚杆基础施工对于钻机山区运输、施工效率的要求,有关经验也将为今后大功率轻便型施工机械配套开辟新途径。

This paper outlines the basic structure ,working mechanism and categories of digital cameras, introducing mainly the pocket type digital camera Kodak DC280,the single reflection lens type,Kodak 460, and the back-housing type digital camera,China-made Chaoyi brand digital camera.

本文简明阐述数字照相机基本结构、工作原理和类型,重点介绍了轻便型数字照相机——柯达DC280、单反型数字照相机——柯达DCS460和机背型数字照相机——国产超意牌数字照相机。