The work of the paper is as follows: ( 1) Non-linear characters of the coal chemicals price time series can be determined according to BDS methods.

With growth of coal chemicals and natural gas chemicals, methanol output in China will rise greatly and development of products from methanol become imminent.

随着煤化工和天然气化工的发展，我国甲醇产量将有较大幅度的增长，甲醇下游产品的开发迫在眉睫。

The first was the conversion convert to petrochemical from coal chemicals.

第一次产业结构调整的目标是实现煤化工向石油化工的转化；

If defective seamless tubes were used in some important occasions such as petroleum, chemicals and boiler, it would lead to disastrous consequences.

由于无缝钢管大都应用于石油、化工和锅炉等高压、高危的场合，如果存在缺陷，将会造成灾难性的后果。

It is widely used for such industries as ship making, mechanical manufacturing, pressure container, petroleum, chemicals and home appliances etc.

广泛用于造船、机械制造、压力容器、石油、化工、家电等行业。

The major applications of SMB chromatography are also reviewed in fine chemicals, petroleum chemicals and pharmaceuticals fields. At last, the researching status of this technology in our country and the problems existed are presented.

在此基础上，综述了该技术国内外的研究进展以及在精细化工、石油化工、制药等方面的主要应用，对该技术在我国的研究现状以及存在的问题也作了介绍。

There are three main types synthetic soil conditioner available, derived from petroleum chemicals, the Tertiary period minerals and organic materials.

人工合成土壤结构改良剂可分为石油化工产品、第三纪矿物产品以及无机物与有机物相结合产品共三类。

Tap water is never chemically pure.

自来水从来不是化学上的纯水。

The chemically pure stronium carbonate could be prepared directly from the industrial grade stronium solution by using a new type of calcium removing reagent.

使用工业上新型的除钙剂，由工业级原锶液，可直接制得化学纯碳酸锶。

The results show seawater extracting potassium sulfite cooking rice straw and chemically pure potassium sulfite cooking rice straw have similar results.

用海水制取的亚硫酸钾用于稻草蒸煮，其结果与化学纯亚硫酸钾的蒸煮结果相似。

A new balance traffic management strategy

一种新型的平衡交通调度策略

The position measuring system was another important system in the new balance calibration system.

新研制的天平校准系统已经投入实际应用。

Study of requirements and equivalent circuit of new balance transformer

新型平衡变压器的平衡条件及等值电路研究

But here. Let's look at the New Balance shoes.

在这里，来看看纽巴伦的鞋子吧。

Hence, there should be a new balance between government and market.

为此，政府与市场之间需要达成一种新的均衡。

Methods The clinical and pathological data of 7 cases of OBC presenting with supraclavicular tumor were analyzed retrospectively.

方法对经我院手术治疗的7例表现为同侧锁骨上肿块的隐匿性乳腺癌的临床及病理资料进行回顾性分析。

OBC gets data from sensors and modifies it with satellite-earth conversion models.

星上计算机接收星上敏感器的物理输出，并经过星地转换模型对传感器数据进行修正。

An Earthquake The cable used in OBC survey is sometimes incapable of sinking to the design position.

在海底电缆地震勘探时，拖放的电缆往往不能下沉在设计位置。

Objective: To investigate the diagnosis of occult breast cancer ( OBC) and its management.

目的：探讨隐性乳腺癌的诊断和治疗方法。

Seven cases of occult breast cancer ( OBC) were reported in this paper.

本文报告隐匿性乳腺癌7例，均以腋下肿块为首发症状。

Biopsy of the mass is the best method for OBC diagnosis.

确定性诊断需行腋下肿块活检。