M-type (metallic-type, aka M-class) asteroids are a spectral class of asteroids which appear to contain higher concentrations of metal phases (e.g. iron-nickel) than other asteroid classes, [1] and are widely thought to be the source of iron meteorites.

2010年12月1日 · Near simultaneous observations in the near-infrared and the S-band radar have revealed some interesting insights into the Tholen M-type (Bus–DeMeo Xc and Xk type) asteroids. By correlating near-infrared spectral features with metal abundances, we have cataloged the multi-wavelength behavior of 16 asteroids, and presented an analysis of the ...

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Significant reduction of brake dust without sacrificing brake performance! Stable operating friction level for superior brake control. Braking power that is NOT abrupt; Smooth braking for a comfortable ride during braking. Designed to minimize disc wear to …

2024年12月10日 · The MG M-Type Midget, launched in 1928, was a game-changer. Powered by a modest 847cc engine, it brought affordable motoring excitement to the masses. Its success set the stage for MG’s dominance in the small sports car market.

2025年1月30日 · M型插头和插座俗称大南非插头和插座，几乎只在南非、斯威士兰和莱索托等国使用。 M型插头的外观与印度的D型插头很相似，不过它的三个插脚都要更大一些。 M型插头的额定电流为15 A，有三个呈三角形排列的圆插脚。 位于中间的接地插脚长28.6 mm、直径为8.7 mm；零线和火线插脚长18.6 mm、直径为7.1 mm，中心相距25.4 mm。 南非使用的M型插头的插脚底部一般都有绝缘层，所以即使插头没有完全插入插座中，也能避免触电危险。 M型插头. …

type () 函数如果你只有第一个参数则返回对象的类型，三个参数返回新的类型对象。 isinstance () 与 type () 区别： type () 不会认为子类是一种父类类型，不考虑继承关系。 isinstance () 会认为子类是一种父类类型，考虑继承关系。 如果要判断两个类型是否相同推荐使用 isinstance ()。 name -- 类的名称。 bases -- 基类的元组。 dict -- 字典，类内定义的命名空间变量。 一个参数返回对象类型, 三个参数，返回新的类型对象。 Python type () 函数 Python 内置函数 描述 type () 函数如 …

2021年9月1日 · M-type hexaferrite has attracted much attention for its large magneto-crystalline anisotropic energy, exceptionally good chemical stability, corrosion resistance, high Curie temperature, and high coercivity. In this review paper, our goal is to examine the microwave absorption properties and related studies of M-type hexaferrite-based materials.

The M-type connector is one of the most used and least expensive connector types. With an option for IP65 to IP69 protection, M-type connectors provide reliable data and power transmission in harsh environments. As an industry-standard connector, the M-type is widely available for new projects and replacements are easily accessible.

2025年1月29日 · Types in the M language form a disjoint hierarchy rooted at type any, which is the type that classifies all values. Any M value conforms to exactly one primitive subtype of any. The closed set of primitive types deriving from type …