China on Monday announced sanctions on 10 American military-related companies in response to a recent US move that bars some leading Chinese technology companies from defence contracts.China's Commerce Ministry said Chinese companies would be blocked from exporting "dual-use" items to the 10 firms. It said the step was meant to safeguard China's national security and respond to what it called the US government's "wrongful expansion of its so-called List of Chinese Military Companies".advertisementRead Full StoryThe ministry said dual-use items are goods that can have both military and non-military applications. It also said companies or individuals in third countries would be…