Ukraine’s factory owners are trying to overcome the enormous challenges of wartime to keep assembly lines and the besieged nation’s economy moving. In the city of Dnipro, Klim Tulin is keeping cardboard boxes moving out of a family-owned plant to local food producers even as the business runs low on materials and the threat of lost power and even missile attacks looms over operations. The WSJ Logistics Report’s Paul Berger writes that small factories like Mr. Tulin’s are part of the backbone of Ukraine’s industrial economy, and provide materials that support Ukraine’s sprawling agricultural sector. Their supply chains are embattled in either direction, with crucial raw materials difficult to secure and paths to buyers abroad all but cut off. One manufacturer of boilers says he’s trying to help the country’s industrial sector remain intact, even as his own stocks of steel and industrial gas run low.