Fixed pitch propeller is characterized by fixed pitch, simple installation, low cost, convenient management and small maintenance. If the boat is fix for one function like fix running rpm, so its propeller will come to be a fix pitch propeller which means
This is the best anti-bleed marker paper, it's bright, smooth and vibrant. Ink can be drawn in layers without penetrating or damaging the underlying paper. Provide you with good work efficiency and convenience.
The water flow measurement instruments plug-in electromagnetic flowmeter is suitable for pipes with large diameters.and is suitable for chemical industry, electric power, metallurgy, petroleum, water supply and drainage, papermaking, medicine, food and ot