Adjustable fitting; can be used both with lamp bases and with ceiling cord sets and big or small incandescent bulb.
固定件可调节；可与灯座和天花板吊灯及大小白炽灯泡并用。
The instrument are designed with adjustable center holes at both ends that make its fitting and measuring rapidly and easy.
该仪器两端设计有可调心式中心孔，安装测量迅速方便。
Gliding setting: endurable and wear resisting slip fitting in slider part, adjustable gap. It is easy to assemble, and it makes little noise and has a long working life.
滑杆部位采用滑动装置经久耐磨、间隙可调安装简洁、噪音低、使用寿命长。
Gliding setting: endurable and wear resisting slip fitting in slider part, adjustable gap. It is easy to assemble, and it makes little noise and has a long working life.
滑杆部位采用滑动装置经久耐磨、间隙可调安装简洁、噪音低、使用寿命长。
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