Matters to be observed when using corn herbicides
At the moment, corn planting is about to begin, and agricultural technicians have investigated households and found that most farmers use corn herbicides after planting in order to save labor and effort. Here, the agricultural technicians recommend that the majority of farmers pay attention to the following matters when using herbicides: 1. Reasonable mastering of the application time, generally after the corn is planted until the emergence of the seedlings, the herbicide has the best effect when the ground is wet. 2, strictly control the use of pesticides , according to the use of the instructions, reasonable doses, too much to produce phytotoxicity, too little to achieve the desired effect. 3, spray the best choice of weather wind below the third level, to avoid windy weather application, to prevent drift caused by phytotoxicity, time is best before 9:00 am or after 4:00 pm. 4, to do evenly when applying, do not re-spray, do not leak spray.
The masonry bit is a variation of the Twist Drill Bit, the bulk of the Tool is a relatively soft steel, and is machined with a mill rather than ground. An insert of tungsten carbide is brazed into the steel to provide the cutting edges.
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Masonry bits typically are used with a Hammer Drill, which hammers the bit into the material being drilled as it rotates; the hammering breaks up the masonry at the Drill Bit tip, and the rotating flutes carry away the dust.
Hammer drill bits often use special shank shapes such as the SDS type, which allows the bit to slide within the chuck when hammering, without the whole heavy chuck executing the hammering motion.
Masonry bits of the style shown are commonly available in diameters from 3 mm to 40 mm. For larger diameters, core bits are used. Masonry bits up to 1,000 mm (39 in) long can be used with hand-portable power tools, and are very effective for installing wiring and plumbing in existing buildings.
