If you prefer a bagless design, all of the cordless vacuums in this guide fall into that category, making them easier and cheaper to maintain than bagged models. Some cordless models also have removable, replaceable battery packs, which is super handy. That means you can buy a replacement battery and install it easily, without needing to seek out professional assistance. Also, these extra batteries cost around $150-$200 a pop — expensive, yes, but nowhere near as costly as buying a whole new cordless vacuum.
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连玉明：我长期关注技术变革对社会结构的影响。城市是技术创新的主要载体，也是社会风险的首发地——从工业革命到信息时代，每一次技术范式转换都伴随着就业结构的深刻变革。
针对上述风险，工信部建议相关单位和用户在部署和应用 OpenClaw 时，充分核查公网暴露情况、权限配置及凭证管理情况，关闭不必要的公网访问，并完善身份认证、访问控制、数据加密和安全审计等安全机制，同时持续关注官方安全公告与加固建议。