Characteristics of cross-joint flush valve: they are time-lapse, self-closing, beeline of water route.
四通冲洗阀特点:延时自闭、水流路径成“一”字型, 适应的水压比较多, 有手柄式、按钮式、脚踏式。
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Last week, the regional Director for Africa brought together representatives from all other WHO regions to map out a joint strategy for eradication as a top, cross-regional priority for WHO.