variable ballast造句

In 2000 the duo set their sights on variable ballast freediving, which comprises two categories.
On 19 and 23 July Dalk1l1?beat the existing world records in the limited and unlimited variable ballast categories by reaching and respectively.
Also the same year the Union launched the, a purpose-built craft with a number of technical innovations including variable ballast for attack operations and an extensible and reloadable torpedo placement spar.
On Monday, she set a world record in the " variable ballast " category by descending on a single breath to 122 meters ( 400 feet ), using a weighted sled to descend and surfacing using fins.
First improving her own mark in the limited variable ballast with a dive in Egypt and three months later, a second one in the unassisted constant ballast category, with a dive to in Ka _ , Antalya Province, Turkey.
It's difficult to find variable ballast in a sentence. 用variable ballast造句挺难的

There remained to break the mythical 107 meter variable ballast no limits record, set by Angela Bandini in November 1989 . On May 16, 1996 at Pasaje Escondido, just off Punta Frances, Andollo mounted her 31 kg ballast sled for her world record attempt.