Text: due to the frequency requirements of the electricity network of the ship, the main motor is operated at constant speed; to meet the variable demand for electricity wave generators are used in addition.

Correct capitalization: Due to the frequency requirements of the electricity network of the ship, the main motor is operated at constant speed; to meet the variable demand for electricity wave generators are used in addition.

Text: pregnancy and childbirth - health - how to choose footwear

Correct capitalization: Pregnancy and childbirth - Health - How to choose footwear

Text: single piece red pearl shell flower necklace

Correct capitalization: Single Piece Red Pearl Shell Flower Necklace

Text: and the weight of the machine was less.

Correct capitalization:
And the weight of the machine was less.