在检查人员密集场所时，对单位的灭火器主要检查哪些内容？
["\u7b54\uff1a\uff081\uff09\u706d\u706b\u5668\u914d\u7f6e\u7c7b\u578b\u6b63\u786e\uff0c\u5982\u6709\u56fa\u4f53\u53ef\u71c3\u7269\u7684\u573a\u6240\u914d\u6709\u80fd\u6251\u706dA\u7c7b\u706b\u707e\u7684\u706d\u706b\u5668\uff1b\uff082\uff09\u50a8\u538b\u5f0f\u706d\u706b\u5668\u538b\u529b\u7b26\u5408\u8981\u6c42\uff0c\u538b\u529b\u8868\u6307\u9488\u5728\u7eff\u533a\uff1b\uff083\uff09\u706d\u706b\u5668\u8bbe\u7f6e\u5728\u660e\u663e\u548c\u4fbf\u4e8e\u53d6\u7528\u7684\u5730\u70b9\uff0c\u4e0d\u5f71\u54cd\u5b89\u5168\u758f\u6563\uff1b\uff084\uff09\u706d\u706b\u5668\u6709\u5b9a\u671f\u7ef4\u62a4\u68c0\u67e5\u7684\u8bb0\u5f55\u3002"]