第四十三章 自主交易平台
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一级星术士项欣的脑门在阳光下闪亮，她微微眯着眼睛，依旧俯视着程晋州，面前的方桌上堆着十几件零散材料，皆是规整的标准件。最新地址ltxsba.pw
多日来的辛苦得到回报，程晋州也变的愈发自信起来，他背着手走到方桌前，颐使气指的道：“还记得普通的天平怎么制作吗？”
“我自然是会的。”项欣句尾还带着拐弯，她学了十多年星术，制作物品也是其中的范畴之一。
程晋州好像没听出其中的讽刺，弹了个响指道：“做一个。”
说着，自己就坐在了一侧的大椅子上。
两人的地位好像瞬间颠倒了过来，项欣张大眼睛，皱眉道：“你现在就准备反悔？”
“你能做出精度0.1克的天平吗？”程晋州表情淡淡的道：“普通的天平你不屑于做，高精度的你又做不出来，这种时候，你想要偷师，就得有付出，先做天平吧。”
项欣眼中蕴满了怒意，重重的“哼”了一声，出奇的没有反抗，抓起桌面上的材料做了起来。先前程晋州理论说的煞有介事，她的确是想要看上一看。星术一道，哪怕是长长眼力，也能增益不小，如此机会，她是不会放弃的——在这一点上，程晋州却是看的很准。
不过，从项欣凸的好像被电击的兔子似的表情能看出，如果程晋州制作失败，下场一定很惨。
程晋州在旁边注意看着，他也要了解一下这个时代的工艺水平。
只见项欣先取出一根长长的直木，在中心位置上刻上记号，随之放在手上，左右摇摆，直到两边平衡，然后用小刀记住重心，接着就转而开始镶刻基座，至于表盘指针，也是人配件般放在一侧。
这种制作方法，基本就和小学生的手工课无异，属于稍艰难些的拼装，技术含量少的可怜，程晋州忍不住出言道：“你这根木头，两边长度重量都不一样怎么办？
项欣啧的一声，右臂亮起微微的光芒，就见一片图案出现在直木上，其表面好像被蚀刻般迅速消减，而且两边消减的速度还不相同。
“对称星阵，专门用来衡量物品的重量。”项欣抬起下巴，蔑视的看了程晋州一眼道：“大部分的东西，都能通过对称星阵来平衡，如果是普通人用刀刻的方法，也许要用掉十天时间。”
神奇的星阵看的程晋州啧啧称奇，道：“浪费还真不少，那些木头是被烧掉了？烧出来的样子倒可以。”
项欣气的光头上都要冒光，不再理会程晋州，转手抓起一只状似螺丝的东西，就要在中间拧起来。
程晋州嗤的又笑了起来。
一级星术士上半身抖了起来，咬牙切齿道：“你笑什么？”
“你这种就是我所说的，会翘起来的天平，也就是最普通的物理天平，这个螺丝，是重心螺丝吧，用来恢复力矩平衡的。但哪怕就是再恢复，它该有的问题不是还得有？”程晋州在项欣的半成品上指指点点，偏偏每句话都能说到点子上。
项欣满脸的怒色也不由的收了下去，数学之道，达者为师——文无第一，数无第二，错了就是错了，连狡辩的余地都没有。
程晋州此时拿捏了起来，做起自己代师讲课的架势，道：“我们要做的是托盘天平，你知道它和普通的物理天平的区别在哪里吗？刀口！”
他一边说着，一边拿起一只鹅毛笔，在直木上轻轻划出两条线道：“当托盘天平自身形状不是一条直线的时候，我们刚才说的问题，自然就解决了。而且……”
项欣的脑袋随着程晋州的比划轻轻上下摇动，见程晋州停下，脑子都不反应就道：“继续啊！”
程晋州莞尔，转而道：“让天平的三个刀口不在直线上，有很多种方法，但本质都是一样的，让其自身区域水平平衡，呶，很简单。”
此刻的口吻，已然是老师教育学生的模样。
项欣还没察觉出问题，认认真真的道：“这样你如何确定两端平衡呢？”
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