[ description ] babyMaterial: HSS HSS (6542 white diamonds) specification: * general MM diameter(0.5 -) 17 mm in diameter.Chief mm200mm250mm300mm350mm400mm450mm500mm550mm600mm650mmi00mm (160)Technology: high quality high speed steel forging, unique groove designSharp, high wear resistanceSuitable for: can deep hole operation, processing all kinds of wood, low hardness non-ferrous metals such as copper iron aluminum
Extra-Long Length Drill Bit - Drill Bits For Metal product details
Model Number:Extra Long Drill Bit
1.High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance.
2.No center punch is needed-the aggressive 135° Quick-Cut points are self-centering and penetrate quickly with less pressure. Will not "walk" or "wander".
3.Precision ground point, flutes, body, clearance and drill diameter for the ultimate in accuracy and performance. Extra-Long Length Drill Bit,Extra Long Drill Bit Extension,Extra Long Auger Bit,Drilling Drills Airctraft Extensoin Changzhou Bomitools Co.,Ltd. , https://www.bomitools.com
1. The fertilization structure is unreasonable, and the proportions of nitrogen, phosphorus and potassium are imbalanced. Some farmers have serious blindness and randomness. Long-term application of a single fertilizer has caused imbalances in nitrogen, phosphorus and potassium in the soil. As a result, although the amount of fertilizer is increased, the yield is not increased, resulting in serious waste.
2. The fertilization method is not scientific. Farmers tend to pay attention to the application of base fertilizer, and rarely carry out top dressing, which not only reduces the fertilizer utilization rate, but also causes the phenomenon of de-fertilization in the later stage of crop growth and affects the yield of crops.
3. Ignore the use of trace elements. Because the trace elements in the soil are not replenished for a long time, the content can not meet the growth needs of the crop. According to the "Minimum Nutrient Law", even if the ratio of nitrogen, phosphorus and potassium is reasonable, the yield of the crop will be affected.
Huaxian Agricultural Technology Promotion Center Lu Shuguang
Type:Twist Drill Bit
Use:Metal Drilling
Product Name: 12 Inch Aircraft Extension Extra Long Drill Bit
Material:HSS and HSS Cobalt
Process:Fully Ground
Standard:Aircraft Extension
Point Angle:135 Degree Split Point
Shank:Straight Shank
Flute Type:Type N Spiral Flute Right Hand
Size:2-13mm, 1/16"-1/2"
Surface Finish:Bright
Application:For Metal Stainless Steel Aluminium PVC Deep Hole Drilling
4.High Speed Steel(HSS) Aircraft Extension Drill Bits are made to the NAS 907 type J, type B standard.
5.Long flute and overall length design is for jobs requiring extra reach or for deep hole drilling.
Problems in farmers' fertilization
The application of chemical fertilizer is an important factor to increase crop yield, but now there is an increase in the amount of fertilizer input, and the effect of increasing yield is not obvious. The main reason is due to the following incorrect fertilization.
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