open system and closed system

Best quality door operator control elevator with permanent magnet motor JJ 1200~3000mm 4-Leafs Center Opening Landing Door Device Fireproof Type Produ...

JJ 1200~3000mm 4-Leafs Center Opening Landing Door Device Fireproof Type Product Description Feature: Safe and reliable: The door hanger has a safety ...

Linear Damper with Customized Dimension for Soft Opening or Soft Closing Application Product Introduction Our linear damper with customized dimension ...

HALL DOOR BALL, BALL BRACKET, OPEN DOOR BALL, CLOSE DOOR BALL ,ELEVATOR PARTS , 30MM ROLLER Products Description: This product is divided into the ope...

Optical Fused Quartz Tube SiO2 Crystal Glass Customized Transparent Both Ends Open One Ends Closed Description of Quartz Tube: Quartz tubes are made o...

57BYGH443-XXB integrated stepper motor with driver open-loop or closed-loop control with 485 communication The integrated stepping system is composed ...

Spa Center Used Single Use PP Slipper Open toe or Closed Toe Style Slipper Advantages: 1. Disposable and nonwoven made 2. Easy to take. Perfect for sp...

Working Temperature 30℃-200℃ BW9700/KSD9700 Iron Shell Normally Open And Normally Closed Series Thermostat Thermal Prot 1.Used in various motors, indu...

Amisco Solenoid valve Coil 4V110 Flying lead type EVI 7 S8 for 3/2 way normally open and normally close valves The EVI7 S8 system by AMISCO includes a...

Small Frameless Automatic Sliding Glass Door Automatic Opening Doors Soft Closing Function Why Choose HUI TRADE INDUSTRY company? Quality Assurance IS...

Open Type Impeller Closed Coupled Chemical Process Pump Liquid Acid with Mechanical Seal Applications The ZA-series chemical pump is excellently suite...

Intelligent Bathroom Smart Toilet Open Front Slow Close 650 * 400 * 430mm Product Description Place of Origin:Anhui, China (Mainland) Brand Name:Royal...

Product Description: Zipper Bags - The Perfect Solution for Storage and Organization Are you tired of cluttered spaces and disorganized belongings? Lo...

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Magnetic Contactor Stsp QA copper wire 3 Pole​ GENERAL STSp Series AC Contactor is suitable for using in the circuits the rated voltage up to 660V AC ...

Product Description: The handle of the umbrella is made of Eva which makes it comfortable to hold and easy to grip. The handle is designed to give a g...

Item name : Cheap gray and black new style custom windproof reverse umbrella less than 3 USD Product Advantages 1. Windproof double canopy ,and the ou...

1) Safe patent auto open and close umbrella 2) Auto open and gradually close safe steel frame 3) 190T pongee printed UV resistnace 4) MOQ: 3000PCS Ser...

Automatic Garage Door Opener 600N with Belt Rail Micro intellectual control: One button to control open, stop and close. DC motor: Low noise, soft sta...