I didn’t realize they were other than FBM’s. Seems that was when they were acting up…on start up and when cold.
As for that steam pump…was that the scene the ranking nurse fixed it with one of her girdles since the Chief didn’t have a replacement spring for the broken one.
(the Chief didn’t think it was “proper” to have a woman’s “unmentionable” stretching back and forth…and the nurse argued that as long as it worked…
never underestimate the resourcefulness of women with their “women’s things”. 
)