Remove one socket pin head screw, three socket head bolts and gear operator cover.

拆卸一个灯头钉头螺丝，三个套筒头螺栓和齿轮执行机构盖。

youdao

Remove one socket pin head screw (c), three socket head bolts (d) and gear operator cover (e).

拆卸一个灯头钉头螺丝(C)，三个套筒头螺栓(d)和齿轮执行机构盖(E)。

youdao

Headed bolts; three-headed Cerberus; a cool-headed fighter pilot.

有头的螺栓；三头神狗；头脑冷静的战斗机飞行员。

youdao

The holding-down bolts of twelve boilers and three triple-expansion engines, unintended to hold such weights from a perpendicular flooring, snapped, and down through a maze of ladders, gratings and fore-and-after bulkheads came these giant masses of steel and iron, puncturing the sides of the ship .

NEWYORKER: Unsinkable

In contrast, B2B marketing has long emphasized the nuts-and-bolts, behind-the-scenes work of marketing (the latter three items in my list).

FORBES: B2B Marketing: the Orphaned Stepchild