The agreement could become a model for similar agreements with other Western arms manufacturers, such as the American companies Raytheon and Lockheed Martin, which are behind the much sought-after Patriot system.
The L119 mobile howitzer can be moved by vehicle - including by helicopter - and has a range of almost 17 kilometers.
Earlier in July, US President Donald Trump said during a visit to Turkey that he wanted to give Ukraine a licence to build its own Patriot missiles. Similar offers have also come from governments and arms suppliers in Europe.
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