Precautions for DOM range folding: DOM range folding
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2. After the setStartAfter () or setStartBefore () method is called, the range. setEndAfter () or range. setEndBefore () method is not called, and the range collapse is directly generated.
What should I pay attention to when purchasing a folding bicycle?
The advantages of small size, light weight, and convenient upper/lower floor after folding make folding bicycles more and more popular. Compared with ordinary bicycles, bicycle folding has the folding feature. Because of this, the overall design must meet high requirements. Due to the uneven quality of the current folding bicycle, many consumers are enjoying the convenience brought by the folding bicycle and have also tasted the pains it brings. The yunmeng County Consumer Council of Hubei Province summarized the situation of complaint handling in recent years and reminded consumers to pay attention to the following points when purchasing bicycle folding:
● Observation. First, observe the bicycle surface, whether the paint is smooth, there are no impurities and obvious color difference, whether there is paint loss and obvious scratches, Frame welding process is exquisite. After the car is folded, check whether the fork, frame, and fork will rub each other, because it should be folded frequently to prevent the car from changing. Finally, we can see the quality of the entire vehicle from the coordination between the frame and the main configuration, and stand behind the wheel to see whether the gap between the frame and the rear triangle is even; stand behind the wheel and check whether the front and rear wheels are in a straight line. If both are visually skewed, the car must be faulty.
● Scale. Some consumers simply pursue convenient transportation and purchase models with small wheel diameter. As everyone knows, the smaller the folding bicycle wheel diameter, the more convenient it is to carry, the worse the riding effect. The diameter range of the folding bicycle wheel should be between 12-20 inch. 16 inch of products are suitable for short-distance cycling, and 20 inch of products are suitable for long-distance cycling. Less than 12 inch of the riding effect is very poor, it is recommended to be careful before buying.
● Number of handshakes. From the Frame Material, mainly aluminum and steel. Aluminum Frame products are mostly about 10 kilograms, not only light weight, and the product has a long life, do not rust. Of course, do not ignore the strength of the frame. Some manufacturers make a fuss about the weight. In fact, they reduce the weight by reducing the thickness of the frame material. It is difficult to ensure that the frame has sufficient strength.
● Recognize the brand. Because the folding part of a bicycle is movable, it is required that the corresponding part have a strong and reliable performance during riding. The frame should be specially designed to have a higher intensity than that of a common bicycle. OEM cars tend to cut corners in terms of paint, materials, spare parts, and design in pursuit of high profits, making it hard to guarantee after-sales services. Therefore, consumers should select products of well-known enterprises whenever possible during their purchase.
The small size and durability of the folding bicycle and the comfort of the bicycle are often difficult to reconcile. In order to meet the requirements of consumers on the one hand, some enterprises often do not know much about the technology of the folding bicycle, to cover up the bad side, consumers should observe more, think twice, and compare goods when purchasing, so that they can purchase products that are satisfactory.
What is the folding range of the bed sheet folding machine?
The general range is generally 3 to 3.3, and the folding machine of Shanghai Chuan Island is used well after it is bought.