Note: Area is based on a gage pin measurement of inside diameter of the hose.
注意：指的是软管直径内部有指针测量器的那部分区域。
On the producing process of the miniature metal halide lamp, due to its bulk, the measurement of its dimensions especially the inside diameter of the necks of the electric arc tube is very difficult.
在超小功率金卤灯生产中，由于受其体积限制，各种尺寸尤其是电弧管泡壳两侧缩颈处的内径测量一直是比较困难的。
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