单词 | technical grade |
释义 | > as lemmastechnical grade technical grade n. see sense A. 3c. technical grade c. Of a chemical or its quality: not of the degree of purity required for a chemical reagent but of sufficient quality for industrial or commercial use. Frequently in technical grade (frequently used attributive).technical water: see Compounds. ΚΠ 1889 Science 25 Jan. 58/2 The preparation of acetic ether intended for technical purposes. 1902 Science 16 May 781/2 It can manufacture..practically all its organic preparations, from a few technical products.] 1918 Jrnl. Amer. Chem. Soc. 40 1285 1200 cc. of amyl alcohol (technical grade, b. p. 128–132°, is satisfactory) are placed in a 5-liter copper can and 1000 g. of technical sodium nitrite are added. 1927 Brit. Patent 250,230 2/2 The technical grade acetone is quite satisfactory for the precipitation. 1931 Jrnl. Physical Chem. 35 791 The chlorate was of technical quality (Merck). 1947 R. E. Kirk & D. F. Othmer Encycl. Chem. Technol. I. 317 The technical grades of 2-octanol are used as solvents for many resins. 1989 E. O. Gangstad Woody Brush Control 176 (table) Physical state, color, and odor: white crystalline solid, odorless (reference grade), brown crystalline solid (technical acid). 2002 D. A. Vallero & J. J. Peirce Engineering Risks of Hazardous Wastes iii. 101 The usage of technical-grade HCH between 1948 and 1997 was recently estimated to be around 10 million tons. < as lemmas |
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