English translation for "无支护顶板跨度"

unsupported back span

Related Translations:

多跨度悬臂梁:  hung span beam

顶板阶梯:  roof step

顶板撑:  crown stay

外顶板:  roof sheet

顶板裂缝:  roof fissure

平巷顶板:  roof of drift

货架顶板:  deck board

岩层顶板:  top of bed

人工顶板:  artificial roof

弱顶板:  poor roof

Similar Words：

"无支付能力" English translation, "无支付能力的" English translation, "无支付能力的人" English translation, "无支高度" English translation, "无支护带式晶体生长" English translation, "无支护对角工作面" English translation, "无支护跨度" English translation, "无支护倾斜分层充填法回采" English translation, "无支护倾斜分层充填开采法" English translation, "无支架番茄" English translation