求翻译：把50X50塑料方接线盒放到加热棒出线处，使φ32的孔正好穿过加热棒固定螺母。在上下两个安装孔中画好标记（可能金属走线槽的腰形孔宽度会有点小，需要用锉刀在所需标记的地方把腰形孔的上端和下端锉掉点）取下塑料方接线盒和金属走线槽，在标记处打φ3.2的孔，深度不要超过1cm，不能打穿。然后用M4丝锥攻螺纹。是什么意思？

50x50 plastic square junction box into the outlet of the heating rods, φ32 hole right through the heating rods nut. Draw a good marker in the upper and lower mounting holes (kidney-shaped holes may be metal to go trough the width of a little, remove the plastic side with a file in place of the requi

The 50 50 X plastic side terminal box on the heater, so that the line should be exactly 32 of the holes through the heating rod mounting nuts. In the upper and lower two mounting holes in picture good marks (probably metal go online slot width of the waist-hole will be a bit small, the need to use f

Plastic terminal block on the heating Rod 50X50 outlet, PHI 32 hole through the heating Rod fixing nut. Painted marks in the upper and lower mounting holes (perhaps metal the line wi