求翻译：在本标准实施前，环境影响报告书已批复的脱硫机组，以及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%）的坑口电厂锅炉执行该限值。是什么意思？

Prior to the implementation of this standard, the environmental impact report has been approved desulfurization unit, and two non-controlled areas in the west of the special low-sulfur coal-fired (coal into the furnace base received less than 0.5% sulfur) of the pit plant boiler implementation of th

In the application of standards, environmental impact report has been approved before the desulphurization units located in the western region, as well as non-two controlled area of the fuel use of the low-sulfur coal (coal into the furnace, received less than 0.5 % sulfur-hang Hau boiler implementa

Before this standard implementation, the environmental effect report already the desulphurization unit which gives a written reply to a subordinate west, as well as is located non-two controls the area burning (to enter stove with the especially low sulfur coal to burn coal receives base sulfur cont

Prior to the implementation of this standard, environmental impact statement has been approved for desulfurization units, as well as 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 boilers to implement the lim

Prior to the implementation of this standard, the environmental impact report has been approved desulfurization unit, and two non-controlled areas in the west of the special low-sulfur coal-fired (coal into the furnace base received less than 0.5% sulfur) of the pit plant boiler implementation of th