求翻译：第3时段位于西部非两控区的 燃用特低硫煤（入炉燃煤收到基硫分小于0.5%）的坑口电厂锅炉须预留脱硫装置空间。是什么意思？

3 hours in the western two-controlled areas of non-specific low-sulfur coal-fired (coal into the furnace base received less than 0.5% sulfur) of the pit plant boiler desulfurization equipment required to set aside space.

Paragraph 3 is located at the Western non-two controlled area of the fuel used for the low-sulfur coal (coal into the furnace, received less than 0.5 % sulfur-) the Hang Hau boiler flue gas desulphurization devices shall be reserved space.

West the 3rd time interval is located non-two controls the area burning (to enter stove with the especially low sulfur coal to burn coal receives base sulfur content to be smaller than 0.5%) the pit mouth power plant boiler to have to reserve the desulphurization installment space.

3rd period is located in Western Africa burning low-sulfur coal of the ICA (received as fired coal-fired base sulfur content is less than 0.5%) of mine power plant boiler space shall be reserved for desulfurization.

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