Safe and reliable: joint design, taking into account the friction on the screw and self Bowl gravity, so that a reliable self-locking joint capabilities.

安全可靠：接头设计时，考虑到上碗扣螺旋摩擦力和自重力作用，使接头具有可靠的自锁能力。

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The Obama administration fears that whenever Rokkasho starts operating, it will add a new dimension of friction in the region, prompting other countries to seek greater nuclear capabilities and more control over them.

WSJ: U.S. Opposes Japan's Nuclear Plan