frequency response 20 20000hz diamond core bit

{"cid":"91188233","title":"Diamond Core Bit with Inner Diameter 1.057-3.34 Inch, Frequency Response 20-20000Hz, and Segment Height 10mm-15mm","imgUrl":"https:\/\/img.chinax.com\/nimg\/54\/c0\/9284ba31fcf9f79be1dc36f87011-200x200-1.jpg","attrs":{"Brand Name":"cge","Place of Origin":"china","Crown Profile":"Standard \/ Serrated W","Standard":"Boart Long Year\/ Atlas Copco","Application":"Concrete, Masonry, Stone","Bluetooth Version":"V5.0","Frequency Response":"20-20000Hz","Length":"7-20 Inch","Bluetooth Standard":"None","Selling Units":"Single Item"}}

{"cid":"91189992","title":"30kw Induction Brazing Machine Diamond Saw Blade Core Bit Segment Teeth Tooth","imgUrl":"https:\/\/img.chinax.com\/nimg\/56\/01\/29a800af7d5890ad837da91c9be0-200x200-1.jpg","attrs":{"Brand Name":"Lanshuo","Model Number":"LSW-30","Minimum Order Quantity":"1 set","Delivery Time":"5-7 working days after receiving advanced payment","Certification":"CE ISO","Place of Origin":"China","Payment Terms":"L\/C, D\/A, D\/P, T\/T, Western Union, MoneyGram","Supply Ability":"2000 set per year","Packaging Details":"1.Standard wooden case, plywood case, and custormized case; 2. Inner packing: packing plastic film and foam in case of friction dampness and shake; 3.Accessories: induction coil 1, foot pedal 1, installing and operating instruction 1 and custormized del","Type":"Induction Brazing Machine","Voltage":"380V","Current":"45A","Rated Capacity":"30kw","Rated Duty Cycle":"100%","Dimension":"690*290*600mm","Weight":"48kg","Usage":"brazing, welding,melting","Power":"30kw","Color":"optional"}}