OP_PUSHDATA1, OP_PUSHDATA2 和 OP_PUSHDATA4

Word	Opcode	Hex	Input	Output	Description
OP_PUSHDATA1	76	0x4c	(special)	data	The next byte contains the number of bytes to be pushed onto the stack.
OP_PUSHDATA2	77	0x4d	(special)	data	The next two bytes contain the number of bytes to be pushed onto the stack.
OP_PUSHDATA4	78	0x4e	(special)	data	The next four bytes contain the number of bytes to be pushed onto the stack.

相应的链接： https://en.bitcoin.it/wiki/Script