crown block〔名词〕冠轮,天车详细»
crown block〔名词〕天车,拱顶石详细»
crown block〔名词〕顶滑车,拱冠石详细»
crown block〔名词〕起重定滑轮,天车详细»
crown block〔名词〕拱顶石,天车,拱顶石详细»
crown block〔名词〕天车详细»
crown block起重定滑轮,天车详细»
天车〔名词〕overhead travelling crane详细»
天车crown pulley;telpher;travelling hoist详细»
天车crown block roller bridge详细»