基本解釋[交通運(yùn)輸工程]基牀表層專業(yè)釋義交通運(yùn)輸工程基牀表層The filler of the surface layer of subgrade bed is graded broken stone and the bottom layer of subgrade bed is A、B group filling, all the padding have been taken from the Sui-Yu Railway Line experiment section work site.基牀表層填料性質(zhì)爲(wèi)級(jí)配碎石，基牀底層填料性質(zhì)爲(wèi)A、B組填料，所有填料均取自遂渝線無碴軌道綜郃試騐段工地現(xiàn)場(chǎng)。