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山东石大油田技术服务股份有限公司是国家教育部批准改制的由中国石油大学的校办产业高科技公司，属国有控股企业，也是石油大学重点教学和科研试验基地之一。公司位于美丽的黄河口石油之城东营市，目前公司注册资本2000万元，资产总值9000万元。

Aleader Machinery is a modern investment casting manufacturer, We are specialized in investment casting, heat treatment, precision machining and surface treatment. We are committed to providing our customers with high-quality castings and manufacturing solutions.

SLAA Tape is a adhesive tapes manufacturer in China, professional supply and convert high quality adhesive tapes. We have over 10 years experience converting the Gaffers tape,Masking Tape, Splicing tape, Aluminum foil tapes, Washi Paper Tape etc.

Dongying Highco Metal Manufacturing Co.,Ltd. is a Stainless Steel Railing Fittings Manufacturer n China .We do not only produce these parts according drawings or samples from our customers, but also offer our design or idea to help our customers improve these products.

DeYou Tape is a lager aluminum foil tape manufacturer in china. We supply synthetic rubber resin adhesive tape, Water-based acrylic adhesive tape, solvent-based acrylic adhesive tape, alum foil glass cloth tape, reinforced aluminum foil facing.

Shengya Chemical is the professional manufacturer of sodium chlorite and its related chemicals in China. The main products are: Solid Sodium Chlorite, Sodium Chlorite solution, Chlorine Dioxide, Sodium Bisulfate.

Dongying Tianqi Technology Co., Ltd. is a leading stainless steel fasteners manufacturer located in the Dongying Economic and Technological Development Zone, China. Top-quality Stainless Steel Screws, including Hex Socket Screws, Cross Recessed Machine Screws, Self Drilling, Self Tapping, and Set Screws. It's selection features 304, 316, 316L, and 2205 stainless steel options, with GB and DIN standards. Durable, reliable screws for all your industrial and construction needs.