主锯片升降采用螺杆，螺母结构，平稳可靠。

With the main blade lifting screw, nut structure, stable and reliable.

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每次飞完检查主旋翼头和尾旋翼头的螺丝螺母是一个很好的习惯。

It is a good practice to check the bolts and nuts on the main rotor head and tail rotor after every flight.

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本司主打五金产品：四脚钉、铆螺母、内外牙、管内螺母、拉手、三合一、脚轮等等。

Our main products is: T nut, rivet nut, blind nut, insert nut, round nut, handle, triple-play, caster, etc.

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