-
![Omnidirectional Audio Jammer]()
Omnidirectional Audio JammerOmnidirectional Multi-angle Shielding. Voice Recording jammer. Model: AAT-SJ-C -
![Voice Security]()
Voice SecurityVoice information security & UV disinfection protection boxDefender Recording Shielding audio jammerModel:AAT- AZ -1B -
![Mini 360 ° Ultrasonic Recording Shield]()
Mini 360 ° Ultrasonic Recording ShieldMini 360 ° Three-Dimensional Ultrasonic Audio Jammer . Model: AAT-ER-360mini -
![Hidden Voice Recording Jammer]()
-
![Ultrasonic Interference]()
Ultrasonic InterferenceDistributed Recording Shielding System, Conference Room anti-recording shielding system,Voice Recording jammer. Model: AAT-SJ-F12 -
![Sound Blocker]()
Sound BlockerDistributed Recording Shielding System, Conference Room anti-recording shielding system. Voice Recording jammer. Model: AAT-SJ-FX(X=4/6/12) -
![Noise Generator]()
Noise GeneratorHigh Power 6 Terminals voice Recording Jammer Voice Recording Jammer. Model: AAT-SJ-N6 -
![Anti Recording Blocker]()
Anti Recording BlockerHigh Power 9 Terminals voice Recording Jammer Voice Recording Jammer. Model: AAT-SJ-N9 -
![Audio Jamming]()
Audio JammingDefender Recording Shielding System, audio jammer has no noise, no discomfort and good shielding effect.. Voice Recording jammer. Model: AAT- WS -3 -
![Defender Recording Shielding System]()
Defender Recording Shielding SystemDefender Recording Shielding System, audio jammer, recording muffler Voice Recording jammer. Model: AAT- WS -5 -
![Ultrasound Speech Protector]()
Ultrasound Speech ProtectorDesktop type recording shielder Auido jammer. Model: AAT- SJ – DT -
![Talk Jammer]()
Talk JammerProtable Handheld Recording Shield. Voice Recording jammer. Model: AAT-SJ-mini-2
Joel Boettcher
Pearlie Isenhour
Lorrie Bowman
Edna Winton
David McDonald
Elvira Lacroix
Manganese Steel Casting Foundry-Qiming Casting® Qiming Casting is one of the largest manganese steel casting foundries in the China market, which focuses on casting Hadfield...
Silicomanganese with 28-30 percent Si, for which pecially prepared high-manganese low-phosphorous slag serves as raw material, is used in the production of metallic manganese....
Silicone Element. The specification content of silicon in high manganese steel is 0.3% ～ 0.8%. Silicon will reduce the solubility of carbon in austenite, promote carbide precipitation, and...
Jun 09, 2018 · Silico-manganese (Si-Mn) is an alloy used for adding both silicon (Si) and manganese (Mn) to liquid steel during steelmaking at low carbon (C) content. A standard Si-Mn...
This practice will cause contamination of each melt and it will be very difficult to get good castings. DO NOT use “any size” crucible in your furnace. Use the size for which the furnace...
Nov 14, 2018 · Richard Gundlach. November 14, 2018. A research study funded and published in 2013 by AFS and the Iron Division demonstrated that, through balancing manganese and sulfur...