基面上的积垢、浮浆、脱模剂、油污、装饰物、尘土等脏杂物必须设法清理干净。

The base surface fouling, floating pulp, release agents, oil, decorative objects, dust, dirt and other debris must try to clean up.

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每一振点的振捣延续时间应使混凝土表面呈现浮浆和不再沉落为止，约20 ~30s。

For every vibrating point, the vibration shall go on till free mortar appears on the concrete surface and not sinks any more, normally 20 ~ 30s.

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每一振点的振捣延续时间应使混凝土表面呈现浮浆和不再沉落为止，约20 ~30s。

For every vibrating point, the vibration shall go on till free mortar appears on the concrete surface and not sinks any more, normally 20 ~ 30s.

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