Sedimentation tank shall be cleaned or sand therein shall be replaced in case of drainage difficulty.

当沉积池排水不畅时，清理并替换砂砾；

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Sedimentary soil shall be cleared when reaching 50% of the capacity. Sedimentation tank shall be cleaned or sand therein shall be replaced in case of drainage difficulty.

当沉积土达容量的50％时，清理沉积泥土；当沉淀池排水不畅时，清理或替换砂砾；

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There are some disadvantages in present stereotaxic hemorrhage aspiration such as the difficulty of the drainage cruor and the repeat of the punctures.

目前，使用较广的立体定向抽吸术普遍存在因血肿多呈血凝固状态而不易达到引流血肿的目的，以及需多次重复穿刺的缺点。

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