Add punctuation: He was therefore allowed to travel into the country a number of times which lead him to many important adventures and discoveries in South America
A: He was therefore allowed to travel into the country a number of times, which lead him to many important adventures and discoveries in South America.

Add punctuation: Assembly to the machine body by means of two M5 cylindrical head screws with hexagon socket
A: Assembly to the machine body by means of two M5 cylindrical head screws with hexagon socket:

Add punctuation: 1 Use the search function on the forums
A:
1. Use the search function on the forums