The derrick to be laid down on deck, cargo blocks, span takles, guide rollers and all moving parts of derrick of derrick to be dismantled. Cleaned and greased with special grese.

　
英 美
  • 吊桿放置甲板上,吊貨滑車(chē),調節跨幅復式滑車(chē),導輪及吊貨桿上所有活動(dòng)部件拆開(kāi),清潔,加優(yōu)質(zhì)潤滑脂。
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