When the plastering is well done, it can last for as long as half a century.

If they are installed properly they can last for half a century.

Exhaust gas catalysts are poisoned by sulphur species in the fuel, but if mounted under-floor do not reach a temperature at which sulphur may be removed.

If mounted for rotation with the shaft, the bearing pads (12) move relative to a smooth support surface.

These are also capable of bursting if they are hooked up backwards and contain corrosive ingredients.

Nor is it permissible to kill animals, unless they are being ridden into battle against the Muslims, or killing them will help defeat the enemy.

Nor is it permissible to kill animals, unless they are being ridden into battle against the Muslims, or if killing them will help defeat the enemy.