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Subject: shall be trapped at one end, except that a maximum of 6 adjacent pump drains may be connected together before sealed entry into a manhole or catch basin O&G, karach. All equipment drains shall be trapped at one end, except that a maximum of 6 adjacent pump drains may be connected together before sealed entry into a manhole or catch basin.
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Похоже, что писал человек не совсем английский. Попрообуйте заменить: except that -> besides sealed -> sealing |
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