| 摘要 |
A trim-tilt device 20 for a marine boat motor has a housing 31 forming a large-diameter trim chamber 32, a cylinder 41 inserted into the trim chamber 32 of the housing 31 to form a small-diameter tilt chamber 42, and a piston rod telescopically inserted into the tilt chamber 42 of the cylinder 41. Built into the wall of the cylinder 41 is the passage 46 for interconnecting a first trim chamber 32A and a first tilt chamber 42A.
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