轨枕之间不允许在双枕，短枕以及枕头处进行接触。
Sleepers are not allowed to contact each other at double sleeper , short sleeper and sleeper heads .
大豆短叶柄弱枕性状光温反应及遗传的初步研究
Primary Studies on the Responses of Soybean with Characters of Short Petiole and Weak Pillow to Temperature and Day Length and its Inheritance
短枕