DHHT DHHT safety security trolley line trolley line trolley line, trolley line monopole monopole trolley line installation, unipolar modular trolley line, trolley line multi-polar, multi-pole copper trolley line, more polar tube trolley line, multi-polar tube trolley line installation, a multi-polar copper plate trolley line, trolley line safety, traffic trolley line, crane trolley line, trolley line crane, crane trolley line , energy-saving trolley line DHH type safety trolley line modular unipolar rare earth aluminum alloy, large carrying capacity, voltage drop is small, aluminum rails and brush friction parts, the use of good wear resistance of stainless steel moldings, moving guide and ensure effective service life, widely used in a variety of large-tonnage gantry cranes, mobile power supply crane, crane container cranes and other machinery. Model Specifications: No. Model Specification sectional area Notes 1 DHH-250A 1602 three extreme poles of any length 6 m 2 DHH-320A 2302 3 DHH-500A 3202 4 DHH-800A 5002 5 DHH-1250A 6002 6 DHH-1600A 12002 7 DHHT-250/700 2502 Copper slide line 8 DHHT-320/1000 3202 9 DHHT-400/1250 4002 10 DHHT-500/1600 5002 11 DHHT-700/2000 7002