With great care he settled the commission's award structure down to the finest detail, and 20 years on it remains substantially unchanged.

Suspension was substantially unchanged but employed softer rear springs.

The hafnium tetrachloride remains substantially unchanged during the reduction and may be recovered readily from the zirconium subhalides.

The cover design, incorporating a photograph, remained substantially unchanged from the early 1900s to the mid-1950s; colour was first introduced there in 1963.

This was soon modified into language that remained substantially unchanged into the final text.