发布时间:2025-02-02 21:54:48
压力表螺纹一般用公制螺纹,如M14*1.5;M10*1;M20*1.5等.国内液压胶管连接螺纹用英制螺纹比较多,所以有时压力表螺纹要用G1/4的规格
led灯通常讲的几并几串列10串5并 3528 电源配几v几w几ma
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