大家都知道沙盘模型是展示整个艺术的精华，那么沙盘模型里轨迹线路的布置就相当于其血管！如果轨迹线路的布置不是很好的话，那么可想而知其效果也是大打折扣的！那么沙盘模型制作时轨迹线路的安置要注意什么呢？或者说沙盘模型制作时应如何布线？
Everyone knows that the sand table model is the essence of the whole art, so the placement of track lines in the sand table model is equivalent to its blood vessels! If the track layout is not very good, then it is conceivable that the effect is also a big discount! So what should be paid attention to the placement of track lines when making the sand table model? Or how should the sand table model be made?
1、轨迹线路在规划上 要尽量防止呈现Ｓ形弯道（即一个左弯轨迹直 连续一个右弯轨迹），因为稍微长一点的机车 和车厢在经过Ｓ形弯道时很容易被别越轨；
1. Trajectory routes should be planned to avoid S-shaped curves (i.e. a left-turn track is straight and a right-turn track is continuous), because slightly longer locomotives and carriages are easy to be detached when passing through S-shaped curves;
2、如果规划了坡道，必须要控制斜度，斜度选用锌合金的，不然将来由于轨迹氧化造成接 触不良会给你带来很大的烦恼。弯道的小半径，选择时既要考虑沙盘的面积尺寸，还要兼顾到在轨迹上行进的机车和车 厢的长度，不要做好后，稍微长一点的机车、 车厢都不能顺利经过；

2. If the ramp is planned, the slope must be controlled. Zinc alloy is the best choice for the slope. Otherwise, bad contact due to trajectory oxidation will cause you great trouble in the future. When choosing the minimum radius of the bend, we should consider not only the size of the sand table, but also the length of the locomotive and carriage traveling on the track. After not doing well, the slightly longer locomotive and carriage can not pass smoothly.
3、另外对于国内 车迷而言，百万城的轨迹和道岔还是一个很不错的选择，轨迹能够直接运用，道岔只需在安 装前对轨尖部进行细心打磨和修整，就能够防止绝大部分的越轨事端。对于资金很富余的车迷朋友，还能够有更多的选择。 要注重沙盘底座的规划，一是下部要留出穿线的空间，方便布线和今后改造。
3. In addition, for domestic car fans, millions of city track and turnout is a good choice, the track can be used directly, the turnout only needs to be carefully polished and trimmed before installation, can prevent most of the derailment. There are more choices for the fans and friends who have a lot of money. We should pay attention to the planning of the sand tray base. First, the lower part should leave space for threading to facilitate wiring and future transformation.
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