English translation: customer segments/ new customers in various industries/ new market segments
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GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW)
German term or phrase:
customer segments/ new customers in various industries/ new market segments
Explanation: You are right: "customer industries" is an ugly term, but is used. You may also use "customer segments" or, simply, "customers in various industries". In effect, they are looking for new customers in various industries - that's all.