VANCOUVER, BC, July 7, 2022 /PRNewswire/ – Rock Tech Lithium Inc. (TSXV: RCK) (OTCQX: RCKTF) (FWB: RJIB) (WKN: A1XF0V) (“Rock Tech” or the “Company”) has entered into a non-binding Memorandum of Understanding (the “MOU”) with materials distributor and service provider thyssenkrupp…