The name is a reference to InternationalPrototype kilogram, as a base unit of mass in the International System of Units.
它的名字和国际单位中表示基本聚合物质质量千克有关。
2
The internationalprototype kilogram, the primary standard (see weights and measures) for weight, is made of an alloy comprising 90% platinum and 10% iridium.
国际标准质量千克的原型就是由90%铂和10%铱的合金制成的。
3
Support prototype and production assembly events at domestic or international locations.