Directions: Scan the following passage and find the words which have roughly the same meanings as those given below.

     The first astronaut to walk in space, Leonov, and his companion, Beliaiev, began making preparations for the walk as soon as their spaceship was launched. The spaceship was equipped with a double door, which was fitted with bellows between the ship and the outside. This made it possible for the astronaut, in his space suit with oxygen supply, to go first from the air-filled ship to the bellows. Then the air was let out of the bellows, and, while the man stepped outside, the air inside the ship remained at normal pressure. If the door had opened directly into space, the air in the ship would have rushed out and been lost when the door opened.