顶出开始向前延进 Delaying ejector to start forward
从一开始的单纯双顶径 biparietal diameter ; BPD
有点想从顶上开始 Kinda like you're startin' from the top
实测数据分析表明，管节开始顶进时轴力随顶进距离增大而增大，顶进到一定距离后，基本维持在一定范围内。
Field data were analyzed. It showed that axis force increased along with pipe jacking at the very start, and it maintained stated basically when jacking to a certain distance.
这个人卖掉了他的房子，买了一顶帐篷，在海边搭起帐篷，开始在鹅卵石上试验。
The man sold his house, bought a tent, camped on the seashore, and began testing pebbles.
他戴了一顶草帽，以防止开始变秃的头被晒伤。
He wore a straw hat to keep his balding head from getting sunburned.
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