一级做a爰片性色毛片成人久久久国产一级a毛|欧美激情国产精品视频一区二区|婷婷综合尤物精品国产|91香蕉亚洲精品人人影视|亚洲精品免费日日日夜夜夜夜|亚洲永久精品免费www51zcm|日韩永久精品大片www|天天综合丨国产丨精品入口

Copper covered steel ground rod

Online Inquiry
Click Refresh Verification Code

Details

Copper covered steel ground rod

The copper covered steel ground rod is made of super-quality soft steel with good softness and carbon content of 0.10%-0.30%, and high-conducting electrolytic copper is uniformly covered on the surface of  the round steel by adopting a special technology, and the thickness is within the range of 0.25-0.5mm. The technology can effectively slow the speed of underground oxidation of the ground rod; and the ground rod adopts a roller thread groove to machine threads, thereby keeping the tight connection between steel and copper, ensuring high strength and having good electric grounding performance.


Model

 HD-Φ14x*

 HD-Φ18x*

 HD-Φ20x*

Maximum discharge current Imax ( 8/20ms)

250kA

250kA

250kA


Home
Tel
Message
Contact