缩小了保护范围 to narrow the scope of protection 喷头保护范围 sprinkler coverage ; rinkler coverage 限定了保护范围 to delimite the scope of protection ..
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extended coverage sidewall sprinkler 扩大覆盖面边墙式洒水喷头
extended coverage sprinkler 扩大覆盖面洒水喷头 ; 扩大覆盖面积洒水喷头
quick-response extended coverage sprinkler 快速反应扩大覆盖面洒水喷头
standard coverage sprinkler 标准覆盖面积洒水喷头 ; 标准覆盖面积喷头
extended coverage rotary sprinkler 扩展覆盖面旋转型喷头
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