The paper presents the analysis of PDC bit structure commonly applied in colliery and coal field exploration and a brief introduction on processing technology and attentions which should be paid in application.

主要對(duì)煤礦和煤田勘探中常用的金剛石復(fù)合片鉆頭的結(jié)構(gòu)進(jìn)行了分析，并簡(jiǎn)要介紹了復(fù)合片鉆頭的加工工藝和使用中應(yīng)注意的問(wèn)題漂亮姑娘一级黄色。

It is tightly related to network of information technology in colliery safety.

這與我國(guó)煤礦安全信息技術(shù)的網(wǎng)絡(luò)化程度不高密切相關(guān)国产高清肏屄AV。

It has been verified the feasibility that power line carrier communication systems uses in Colliery communication system...

并且在試驗(yàn)的基礎(chǔ)上證實(shí)了電力載波通信系統(tǒng)在煤礦通信中應(yīng)用的可行性人妖系列。

Safety in production and prevention of occupational disease in colliery are consistent policies of the Chinese government.

堅(jiān)持煤礦安全生產(chǎn)和職業(yè)病的防治是中國(guó)政府的一貫方針偷拍视频亚洲。

All of these are threatening the production safety of colliery enterprise.

其中特大巨黑吊XXXX高潮，煤礦水災(zāi)害是煤礦建設(shè)和生產(chǎn)中的主要災(zāi)害之一。

To identify and analyze the potential occupational hazard of the colliery,and explore prevention and control measures.

目的識(shí)別网红日批视频、分析某中型煤礦可能產(chǎn)生的職業(yè)病危害因素亚洲精品在线视频，探討其預(yù)防與控制對(duì)策。

ERP management models, methods and technology approaches aimed to colliery enterprises are researched in this paper.

本文闡述了探索適合煤炭企業(yè)的ERP管理模式與管理方法及應(yīng)用ERP系統(tǒng)的技術(shù)途徑在线日本免费黄色视频。

The very stale air of the colliery was better than oxygen to him.

他正開始他的事業(yè)了欧美视频日，他正在開始他的事業(yè)了。

This company runs what the colliery controls, there is the hardware that has software.

這家公司做煤礦監(jiān)控的欧美黄色片，有硬件有軟件日韩毛片色哟哟一区二区三区四区五区。

Can let them meet from this two respects so such, even this kind of colliery also.

所以從這兩方面都會(huì)讓他們會(huì)這樣，甚至這種煤礦也一個(gè)绿色私人午夜。