That position number is needed in case the node has siblings of the same type and name, to indicate which one we're referring to.
位置号是必需的，以防节点有相同类型和名称的兄弟节点，这样可以表明我们引用的是哪个节点。
It can be arbitrarily set number of rows of welding knives and row position number of knives.
可任意设定焊接刀排数和刀排位置号。
There are more than 200 genes controlling and adjusting teeth development. They decide tooth position, number, size and shape, etc.
在牙齿的发育形成过程中有多达200多个基因参与调控，它们决定各个牙齿的位置、数目、大小和形状等。
Based on the temperature sensor DS18X20 serial, a double-addresses method by writing the position-number into sensors is presented.
本文以ds18x20系列温度传感器为例，提出了将传感器在现场的位置编号写入其内部，形成“双地址”的方法。
Based on the temperature sensor DS18X20 serial, a double-addresses method by writing the position-number into sensors is presented.
本文以ds18x20系列温度传感器为例，提出了将传感器在现场的位置编号写入其内部，形成“双地址”的方法。
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