A push broach is installed at the upper mould, and a holder is installed at the lower mould;

所述的推刀安装在上模的固定板中并用螺栓锁紧；

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Support may be provided by a reduced pressure within an upper mould, a mechanical arm, or gas directed in a generally upwards direction.

支持可在上层模具，机械手臂，或气体执导普遍向上方向降低的压力。

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The upper and the lower mould cores are made of hard alloy materials.

上模芯和下模芯采用硬质合金材料。

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"Mould (on plants) can irritate asthma, increase upper respiratory problems, cause headaches and affect concentration, " Dr. David Miller an expert on indoor air quality from Carleton University, Canada told the Globe and Mail newspaper.

CNN: Office foliage for feel good factor