膨胀螺丝 Traditional 膨脹螺絲 péng zhàng luó sī 🔊 expansion bolt + Keep this word Meanings péng zhàng luó sī 膨脹螺絲 expansion bolt Its characters 膨péngswollen胀zhàngto swell; to distend; to expandHSK 7–9螺luóspiral shell丝sīsilkHSK 7–9