Tunneling jumbos refer to rigs used for underground excavation projects such as underground mine tunnels, railway and highway tunnels, and hydraulic culverts. It can also be used for drilling bolt holes, filling method or room and pillar mining blasthole. The hole diameter is 25-64mm, and the hole depth is 1-5.5m, often 2.5-4m. It is suitable for the tunnel section of 3.2-150m2. The selection of the tunneling rig is mainly based on the roadway section and the driving speed, and at the same time, factors such as the turning radius of the roadway and the support method must be considered.
Tunneling Jumbo,Tunnel Drilling Jumbo,Crawler Tunneling Jumbo,Double Arm Tunneling Jumbo NORTH HEAVY GRYPS EQUIPMENT AND ENGINEERING CO.,LTD , https://www.nhgtunnel.com
It is reported that Wärtsilä's hybrid technology represents the most advanced energy integration and distribution technology in the field of marine applications. Integrating the operational and operational characteristics of a particular ship into its control logic maximizes the operational safety and environmental performance of the ship, especially when working in waters in densely populated areas. 
Recently, Wärtsilä and Rimorchiatori Riuniti signed a sales contract for the WST-24 full-turn propeller, which will provide a complete hybrid propulsion system for the world's first tugboat with Wärtsilä full hybrid technology. Wärtsilä engine, full swing propeller, high density energy storage system, energy management and distribution system. This is the first tugboat order from Wärtsilä's latest R&D full hybrid technology solution launched during the Norwegian Maritime Exhibition on May 30, 2017, which indicates that the mature solution of the technology has been accepted by the market. Different from the simple hybrid solution currently used in the market, the project uses Wärtsilä's latest innovative technology, the full hybrid solution (also known as deep hybrid solution), thanks to high-density battery storage technology and Wärtsilä's advanced all-round energy management system has the following characteristics: instantaneous load-bearing function, full-load power at full speed; full-load independent pure electric operation; cold start; full-power range smoke-free operation; automatic start-stop; Good load optimization; peak load suppression and regulation; energizing technology and light load pure electric operation. Italy's Rimorchiatori Riuniti is the largest tugboat owner and operator in the Mediterranean region and has a fleet of approximately 100 vessels. For this project, Wärtsilä's products will be delivered to customers in the second half of 2018, and the new tug is expected to be put into use in early 2019. It is reported that this 80-ton tow full-mixed propulsion harbour tugboat will operate in the port of Genoa in the near future. At present, in the fleet of Rimorchiatori Riuniti, there have been many ships using Wärtsilä equipment and solutions and have been widely successful.