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In the '80s and' 90s, the district hospital had no beeper and had to let family members run errands. "Nurse, there's no potion in the six, seven or eight beds in our room. Please go and change them quickly." A patient's family came to the nurse's office to yell.
Load and bus tires usually refer to the rim of the rim 18 to 24 inches in diameter, with a section width of 7 inches and above, truck, dump trucks, special purpose and trailer, etc. The road is relatively complex, has the good asphalt, also has a poor gravel, mud, muddy road, snow road, even without the road conditions, driving speed is generally not more than 80 km/h. 4. Construction machinery tires, construction machinery tires is installed on the specificity operation of engineering machinery vehicles, such as loader, bulldozer, excavator, flat machine, roller and land regarding the rig, etc. The speed is not high, but the pavement condition and the load performance are demanding. The tyres are mainly used in the skew structure, but the French rice wheel (cantonese, mandarin is called Michelin) is also used in the meridian structure. The classification can be divided into two categories: standard tire and wide base tire.
Space probe according to the detection of object is divided into lunar probe, probe and interplanetary spacecraft, small body such as a space probe to leave the speed of the earth must be large enough to overcome or get rid of the earth's gravity, realize the deep space flight. The probe orbits the heliocentric elliptical orbit (double-cut orbit) that is tangent to the earth's orbit and the planet's orbit, and may meet the target planet; Increase speed to change the orbit, flew to target the planet can shorten the time in order to ensure the detector fly the double track to the planetary orbits and tangent with the target when the target planets also run to it, must be chosen in the earth and the target planet at a particular moment of relative position detector. Detector can fly around the star, the use of planetary gravitational fields accelerate continuous multiple planets orbit the significant characteristic of space probe is, flying in space for long time, the ground cannot real-time remote control, so must have the ability of autonomous navigation; To fly outside the solar system, away from the sun, solar arrays, and nuclear energy systems; It is necessary to adopt special protective structure to withstand very severe space environment. Landing or walking on the surface of the moon or planet requires some special form of structure
To avoid being accidentally locked out of their own home, many people love to hide a vital with their house in various outside places, like with a flower pot, underneath the welcome mat or in the fake rock inside their landscaping. If you are responsible for this behavior, stop immediately! Numerous home invasions occur since the intruder searched for a concealed key and found it. It will be more affordable to call a locksmith than to switch your stolen valuables.
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