小头直径
- 网络Small head diameter;short diameter;top diameter
小头直径-
对于出口等级，小头直径按照日本农业标准惯例在码头测量，结果采取四舍五入为最接近的偶数。
For export grades , small end diameter is measured at the wharf under the Japanese Agricultural Standard ( JAS ) convention , ie , rounded down to the nearest even two-centimetre interval .
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另外，胶合板材以单段原木平均小头直径分级销售，缺乏检尺和分级标准，木材的合理使用未得到充分体现。
In addition , the sale of plywood timber was according to average small end diameter of log , this method lacked examination and standard , so it was not adequately show the suitable use of wood .
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异径管也叫大小头，两端管口直径不同，用于连接不同直径的管子或法兰进行变径。
Different-diameter pipe size head , also called tube diameter at different , used to connect different diameter of pipe or flange diameter changes on .