Energy dissipation of flood-relief and erosion protection of river bed are key problems for water control project.

消能防沖是水利水電工程的關(guān)鍵技術(shù)問題之一A级毛片18以上观看免费网站，消能是問題的主要方面。

I leaved behind my key in bed.

我把鑰匙落在了床上找黄色性网。

I had allotted my own bedroom for necking, prudently removing both the bed and the key, and taken both myself and my typewriter into my son's bedroom..

我謹(jǐn)慎地搬出了我的床国产嫖妓合集在线观看，拿走了鑰匙，我自己和我的打字機(jī)也挪到了我兒子的臥室三级黄美女安全色网站，留下我的臥室作約會用在线免费观看一区。

The results show that the new fluid nitriding process, which the key component is the fluid bed reactor, could make synthesis condition assuasive, low cost and good effect.

結(jié)果表明：以流化床反應(yīng)器為核心的流化氮化新工藝合成條件溫和、原料成本低毛片一区二区三区免费、效果好免费看很黄A片在线观看视频。

Going to bed early is key to getting enough sleep and helping adolescents feel on top of the world, a new study reported.

一項新的研究表明，早睡是獲得足夠睡眠的關(guān)鍵欧洲无码高清视频在线，并且能夠幫助青少年擁有足夠的信心

key bed：標(biāo)準(zhǔn)層

keweenawan 基維諾統(tǒng) | key bed 標(biāo)準(zhǔn)層 | key borehole 基準(zhǔn)井

key bed：標(biāo)志層

horizon 層位 | key bed 標(biāo)志層 | barren bed 啞層

key bed：指示層

kerosene 煤油(火油) | key bed 指示層 | key diagram 要覽圖

key bed：鍵槽

key bar ==> 鍵棒 | key bed ==> 鍵槽 | key currency ==> 主要貨幣

surface key bed：地表基準(zhǔn)層

surface irregularity 地面起伏 | surface key bed 地表基準(zhǔn)層 | surface kill 地面壓井