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定价: 113元 / 折扣价: 97

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This standard covers letter symbols for SI and other common measurement units. The symbols given in this standard are intended for all applications, including use in text and equations; in graphs and diagrams; and on panels, labels, and nameplates.

定价: 56元 / 折扣价: 48

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A standard protocol for the control of printers that is independent of the underlying data stream or page description language (PDL) used to create the printed page is defined in this standard. This protocol is usable by all classes of printers. The scope of this standard is limited to management and control of printers and does not include management or control of a printing system or subsystems.

定价: 174元 / 折扣价: 148

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This standard includes definitions for physical quantities and units commonly used in applied science and technology, and related terms that concern systems of measurement. Particular emphasis is placed on the International System of Units (SI).

定价: 87元 / 折扣价: 74

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The standard covers letter symbols for units of measurement. The symbols given are intended for all applications, including use in text and equations, in graphs and diagrams, and on panels, labels, and nameplates.

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