Set up a slant water hole at reamer, and connect the reamer and pilot with reducing synergy flute, which strengthen the cooling and washing function and ensure the bit's effects.
The multiple-function pump test-bed can not only test pump's inner and outer performance, but also carry out to test water turbine and small type of water hole.
多功能水泵综合试验台不仅可以进行水泵的内外特性试验，而且还可以进行水轮机试验和小水洞试验。
3
Using full vector orthogonal function model of the auxiliary air hole pattern of cut-off characteristics of optical fiber were discussed.