The ventilation type aging test machine is equipped with a precision-designed air replacement adjustment device and a digital voltmeter, ampere meter, watt-hour meter, and timer, which can be used as the measurement of the air replacement rate.
Product features: This machine is suitable for rubber, plastic, artificial leather and other chemical products to test the aging, elongation, tensile strength and other changes of its materials.Pencil case, a box used by students to hold pens, pencils, rulers, erasers, etc.Many types of texture, generally wood, iron, plastic and other products.Our company produces mostly PVC pencil bags.The material is transparent or transparent with printed patterns to facilitate the user to see what is stored inside.PVC pencil bag is light weight, not easy to dirty, convenient to fold and carry, but also can store a variety of small objects.
Silicone Pencil Grips, Pencil Grips,Color Rubber Pencil Grip,Pencil Grip Holder
shaoxing chaofeng stationery manufacturing CO.,LTD. , https://www.chaofengstationery.com