濟南德瑪電氣有限公司是一家專業從事安全滑觸線設計、生產、銷售的產假，公司生產的DMHX系列單極安全滑觸線外形酷似大寫的H形狀的鋁材，外殼采用聚氯乙烯及對應的安裝配給組成。也是目前市場應用最為廣泛，使用壽命最長的一類安全滑觸線。
其特點如下所示：
1.節能降耗
1. energy conservation and consumption reduction
H型鋁滑線，顧名思義，導體截面呈“H”型，這樣的設計，最大的特點就是節能，降耗。
H-type aluminium sliding line, as its name implies, conductor cross-section is "H" type, such a design, the greatest feature is energy saving, consumption reduction.
2.提高導電率
2. increasing conductivity
電流都有集膚效應，H型設計，可以增加導體截面積，提高導體導電率。
Current has skin effect. H-type design can increase the cross-sectional area of conductor and increase the conductivity of conductor.
3.提高機械強度
3. increase mechanical strength
將鋁材軋制成“H”型，是在保證一定的導電截面積的基礎上亦能提高其整體性和強度。
Rolling aluminium into "H" shape can improve its integrity and strength on the basis of ensuring a certain conductive cross-section area.
4.增加滑觸線壽命
4. Increase the life of sliding contact wire
H型行車滑觸線內嵌不銹鋼帶，可以增加產品耐磨性，從而延長了產品使用壽命。
The H-type sliding contact wire is embedded with stainless steel strip, which can increase the wear resistance of the product and prolong the service life of the product.
5.集電器不容易脫落
5. Collector is not easy to fall off
H型導體內槽較深，可以保證集電器的順暢運行，不像無接縫滑觸線一樣，內槽較淺，集電器容易滑出，造成斷電。
The inner groove of H-type conductor is deep, which can ensure the smooth operation of collector. Unlike seamless sliding contact wire, the inner groove is shallow and collector is easy to slip out, resulting in power failure.
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