5210 is the three anti-mobile phone products that NOKIA launched in March of 2002. After absorbing the advantages of the previous generations of three mobile phones, NOKIA 5210 has made some progress in the field of three mobile phones and has adopted its own Xpress-developed device for the first time. ON shell. Here we go back and look at this three anti-mobile phone. 5210 uses a small and sleek streamline design 5210 to 105mm (L) × 47.5mm (W) × 21mm (H) volume and 92g weight changed "three anti-" mobile phone top three traditional image of the three rough, 5210 used by Nokia said Xpress-on shell. 5210 is a built-in antenna mobile phone, the entire shell is made of translucent black engineering plastic, and then covered with elastic rubber, and rubber coverage is mainly concentrated in the mobile phone peripherals, a small part in the middle of the phone. Of course, simply using rubber shockproof is not enough, if the phone touches the ground is not covered with rubber part? 5210 also have a solution. 5210's shell and the movement are mainly fixed by point contact. There are seven contact points between the shell and the movement. While ensuring the fixation, it also leaves a little between the movement and the shell. Voids. It is these gaps that allow the mobile phone to absorb the impact of contact with the ground through a thin plastic shell that is deformed and effectively absorbed – this is the same principle as the energy-absorbing column used in cars for enhanced safety. . And on both sides of the movement, the lock used to fix the shell also uses a resilient spring to facilitate the removal of the shell and also reduce the vibration of the movement. The 5210's shell has a top-bottom docking design. The upper shell is embedded in the lower shell about 1mm at the junction, making the combination of the two very tight - solving the problem of easy dust and water in the cell phone joints. In addition, the 5210 uses a film-covered keyboard, and the gap between the keys and the body is completely sealed. However, there are several parts to pay special attention to: The opening of the 5210 earpiece, microphone pickup, and ringing tone are all extremely small, and they all cover the interior of the housing with chemical fiber film, which does not affect the sound and pickup, but also blocks the intrusion of dust and water droplets. The charging/headphone jack is designed with rubber caps - the rubber caps are integrated with the body and are very tightly combined. Such "three defenses" design really makes one feel at ease. However, it should be noted that these "three defenses" functions are designed for everyday life and have certain limits. Such as the waterproof function can only prevent the general rain splashing, if you want to bring it to swim or dive, this little stuff can not afford it! In addition, the 5210's appearance still has a lot to note. The lanyard holes are designed on the 5210's four corners. In addition to hanging your mobile phone on your chest, you can also attach it to a backpack, tie it on your leg, and tie it to your arm. In short, you can easily fix the 5210 anywhere you think, whether you are exercising or walking. Then worry about the damage to the love machine. The main parameters: □ Network frequency: GSM; 900/1800MHz □Optional color: aspiration blue, wavy blue, vibrant yellow, meteorological green □ size / volume: 105.5 × 47.5 × 22.5mm □ Weight: 92 g □ Screen parameters: monochrome screen; Chinese: 4 lines □ Talk time: 120-210 minutes □ Standby time: 60-170 hours □ Listing time: March 2002 □ standard configuration: Lithium battery (830mAh), charger, earphone, vitality device [1] [2] [3] [4] [5] [6]
The CAS Registry number of Poly(L-lactic acid) PLLA is 33135-50-1. It is white powder. We can provide Intrinsic viscosity from 0.30-2.25 dl/g, Mw from 6000-30000.
For each batch a certificate of analysis is provided, showing the analytical data determined in our quality control laboratory. Additional analytical data can be made upon request.
When stored in the original packaging at low temperatures (2-8°C), PLLA keeps its initial properties for at least two years.
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NOKIA 5210
5210 positive
Various colors 5210
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