sprag

• اسم يدل على إسفين أو قطعة خشبية تُوضع تحت عجلة المركبة أو بين أسلاكها لمنعها من التدحرج والانزلاق، أو على دعامة خشبية تُسند سقف المنجم.

A noun referring to a chock or bar wedged under a wheel or between spokes to prevent a vehicle from rolling, or a wooden prop used to support a mine roof.

1. Wheel chockC1formal

   A chock or bar wedged under a wheel or between the spokes to prevent a vehicle from rolling down an incline.

   إسفين العجلة

   • The driver placed a sprag under the truck's wheel before unloading.
   • He used a wooden sprag to keep the cart from moving on the hill.
   • Always secure a sprag when parking on a steep slope.

   المرادفاتblockchockscotchstopwedge

2. Mine supportC1formal

   A wooden prop used to support the roof of a mine.

   دِعامة خشبية

   • The miners installed a sprag to reinforce the tunnel ceiling.
   • A broken sprag can cause a dangerous collapse underground.
   • They replaced the old sprag with a new timber support.

   المرادفاتpropstaysupport