济南德玛电气有限公司是一家专业从事安全滑触线设计、生产、销售的产假，公司生产的DMHX系列单极安全滑触线外形酷似大写的H形状的铝材，外壳采用聚氯乙烯及对应的安装配给组成。也是目前市场应用最为广泛，使用寿命最长的一类安全滑触线。
其特点如下所示：
1.节能降耗
1. energy conservation and consumption reduction
H型铝滑线，顾名思义，导体截面呈“H”型，这样的设计，最大的特点就是节能，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.提高导电率
2. increasing conductivity
电流都有集肤效应，H型设计，可以增加导体截面积，提高导体导电率。
Current has skin effect. H-type design can increase the cross-sectional area of conductor and increase the conductivity of conductor.
3.提高机械强度
3. increase mechanical strength
将铝材轧制成“H”型，是在保证一定的导电截面积的基础上亦能提高其整体性和强度。
Rolling aluminium into "H" shape can improve its integrity and strength on the basis of ensuring a certain conductive cross-section area.
4.增加滑触线寿命
4. Increase the life of sliding contact wire
H型行车滑触线内嵌不锈钢带，可以增加产品耐磨性，从而延长了产品使用寿命。
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.集电器不容易脱落
5. Collector is not easy to fall off
H型导体内槽较深，可以保证集电器的顺畅运行，不像无接缝滑触线一样，内槽较浅，集电器容易滑出，造成断电。
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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