FFU laminar flow unit is an air filtering and purifying unit with its own blower fan, it comprises of primary efficiency filter, blower fan, high efficiency filter and static pressure box.

FFU层流罩是一种自带风机的空气过滤净化单元，它由初效过滤器、风机、高效过滤器和静压箱组成。

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It introduced that combined labyrinth packing and dynamic seal instead primary simple labyrinth packing of mixing blower fan seal on carbonization.

介绍了焦化掺混风机壳体密封由原来简单的迷宫密封改为迷宫密封与气动密封相结合。

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But the National Union of Teachers general secretary Christine Blower there was no evidence to show that academy status in primary schools brings any educational benefits.

BBC: writing

"There is nothing particularly new in the idea of primary school teachers requiring more maths subject knowledge, " said general secretary Christine Blower.

BBC: Carol Vorderman says pupils should study maths to 18

Acting general secretary of the National Union of Teachers, Christine Blower, said it was a matter of "concern" that the government was keeping the Cambridge Primary Review "at arms length".

BBC: Primary education 'too narrow'