天气预报 > 文化 > BV4什么意思
BV4什么意思
更新时间: 2021-03-23 15:49:45  

1、BV是铜芯塑料绝缘导线,线芯粗细的称呼都是用截面面积mm2数来表达。电线BV4:铜芯截面积4平方毫米的铜芯聚氯乙烯绝缘布电线。

2、BV导线是在导线外围均匀而密封地包裹一层不导电的材料,如:树脂、塑料、硅橡胶、PVC等,形成绝缘层,防止导电体与外界接触造成漏电、短路、触电等事故发生的电线叫绝缘导线。

关键词: bv4 什么 意思

BV4什么意思相关经验

天气预报

最新推荐

页面:/news/view-779315/ | 耗时:0.6913 s | 内存:2.11 MB | 查询:4 | 缓存读取:3 写入:0 | 加载文件:25
select * from tbl_Articles WHERE ArticleID=779315 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=779315 LIMIT 0,1
select * from tbl_Articles_sphinx where id=779315 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1036144,1107632,974763,778502,985640,578950,1141011,642523,568939,525889,976667,1097497,516862,550769,389369,394059,983041,781256,461681,1110345,1164859,524864,1095640,1064361,1140101,647377,440826,1066458,1066126,458517) ORDER BY field (ArticleID,1036144,1107632,974763,778502,985640,578950,1141011,642523,568939,525889,976667,1097497,516862,550769,389369,394059,983041,781256,461681,1110345,1164859,524864,1095640,1064361,1140101,647377,440826,1066458,1066126,458517)