When the external chassis 2 cylinder make the mouth of the spiral
1. steel plate cylinder is measured by a thousand times, and then welding cylinder
2. steel plate steel plate connected to the 2 first and the steel rain stick to the brush,
3.Adjust the size, and put on the ring, and then the cylinder neck strap, tighten with a B circle
4. Put a 4-inch steel U-shaped curves are attached to the end of the cockpit, the rain and the ring of scale
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