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美国正在西尔堡步枪靶埸利用太阳能作为操作隐现靶的能源。这套太阳能操作的靶板系统,花费15500美元,已在西尔堡步枪靶埸使
The United States is using solar energy as a source of energy for the operation of the target at the Fort Thielburg rifle. The solar-powered target system, which costs $ 15,500, has been used at the target of the Sylter rifle