The separate flushing(air) system can be connected with shank adaptors by internal or external ropethread or trapezoidal thread . The customers can order according to their own requirements.
旁侧供水（风）系统钎尾有内外波形、梯形螺纹连接，用户可根据需要单独订货。
2
When we drew the bucket up from the well, we saw that the rope had worn away , and the bucket was left hanging by a very thin thread.
当我们把水桶从井里提上来，发现绳子几乎要磨断了，水桶仅由一根细线吊着。
3
When nylon first came out it was used primarily by the military for things such as parachutes, thread, and rope. This was followed by nylon's entry into the women's hosiery industry.