But, unlike the cores of the inner planets, the Moon's core contains little or no iron, while the typical planet-forming materials were quite rich in iron.
但是，与内行星的核心不同，月球的核心几乎不含铁，而典型的行星形成物质则富含铁。
2
The finning defects on inner surfaces of castings caused by resin sand cores were introduced, their names and definitions were discussed.
介绍了铸件内腔表面因树脂砂芯引起的飞翅缺陷，并对其名称和形成机理进行了探讨。
3
Our company is a professional salt core (for inner cooling gallery of aluminum piston) producer in China with abundant funds and technical advantages in the production of salt cores.