确保接收窗口大小不超过规定的最大值。
Make sure we do not exceed the maximum possible scaled window.
确需排放的，必须经过净化处理，不超过规定的排放标准。
Where such discharge is really necessary, the discharged gas or dust undergo purification treatment so as not to exceed the prescribed discharge norms.
确需排放的，必须经过净化处理，不超过规定的排放标准。
When such discharge is really necessary, the discharged gas or dust must undergo purification treatment.
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