熟女无套高潮内谢视频韩国,女人荫蒂全部过潮喷,老熟妇仑乱视频一区二,蜜芽忘忧草三区老狼大豆

The crane limiter is a necessary safety device for the crane, which is used to limit the rising height of the fetching device. When the crane's spreader rises to the upper limit position, the limiter will automatically cut off the power supply to prevent the hook and other fetching devices to continue to rise, causing the crane to hit the top. After the wire rope contraction is complete, the electric hoist or the hoist continues to work and pulls off the wire rope, thus causing the heavy object falling accident.

1, this series of products are cast aluminum alloy shell, using a temperature die-casting molding process, die-casting products have smooth surface, beautiful appearance and easy, good feel, fine metal structure and organization, no bubbles, no trachoma, good impact resistance, product shell explosion-proof performance consumption, the product has a direct pressing explosion-proof logo.

2, the product surface through the speed shot blasting and other series of treatment, using the pressure electrostatic spray process for surface spray, plastic layer adhesion, corrosion, oxidation resistance, sunshine performance significantly improved.

3, there are two kinds of rotary type and direct type contact form for users to choose.

4, cable or steel pipe wiring.

structure

1, by the operation head, contact system and shell. In the actual production, the travel switch is installed in the pre-arranged position. When the module installed on the moving parts of the production machinery hits the travel switch, the contact action of the travel switch is realized to switch the circuit.

2. It is an electric appliance that switches the circuit according to the stroke position of the moving parts. Its action principle is similar to that of a button.

3, used for all kinds of machine tools and lifting machinery, to control their travel, terminal limit protection. In the control circuit of the elevator, the travel switch is also used to control the speed of opening and closing the car door, the limit of automatic opening and closing, the upper and lower limits of the car protection.

4. It can be installed on relatively stationary objects (such as fixed frames, door frames, etc., referred to as still life) or moving objects (such as driving, door, etc., referred to as animals).

5. When an animal approaches a still life, the link of the switch drives the contact of the switch to cause the closed contact to break or the open contact to close. The action of the circuit and mechanism is controlled by the change of the opening and closing state of the switch contact.